• Transactions of Materials Processing
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• v.9 no.6
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• pp.574-581
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• 2000

A vertically-walled auto-body part is one of the most difficult stamping parts because of angle change, wall curl, and twisting of the blank after springback as well as fracture and wrinkle. In this study, computational simulations of the vertically-walled auto-body part are carried out focusing on angle change, wall curl, and twisting after springback. Binderwrap blank shape is used in forming analysis for precise initial contacts between punch and blank. An adaptive mesh method is used in springback analysis for precise calculation of bending moments. In springback analysis, the differences of 2 and 3 dimensional analysis are compared and the effects of blank holdig force and friction coefficient are evaluated. In order to verify the validity of simulation results, they are compared with measured ones. The predicted thickness distribution and formed shape are agreed well with those of the measurement. The Predicted springback amount is less than that of the measurement.

• Journal of the Korean Society of Clothing and Textiles
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• v.48 no.3
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• pp.467-484
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• 2024

This study aimed to enhance the design of cropped t-shirts to improve fit satisfaction among women in their 20s by tailoring the t-shirts to diverse body types. Body types were categorized using Size Korea's 8th Human Body Measurement Data, and statistical analysis was conducted based on the Statistical Package for the Social Sciences (version 26.0). This study also reviewed the literature on t-shirts and fit, the application of pattern and design improvements for different body types, verifying fit and size for each body type, and applying virtual fit effects using geometric forms. Frequency analysis and non-parametric verification were conducted using the Friedman test. The results showed that t-shirts with a horizontal rectangular shape was an effective design and that t-shirts with an inverted triangular structure also had a positive effect. In contrast, square t-shirts exhibited minimal effectiveness. These findings are expected to contribute to the consideration of customized shapes according to body type in t-shirt design. Research on customized virtual cropped t-shirts reflecting various body types can expand fit satisfaction studies, particularly amid the increasing trend of online shopping.

• International Journal of Naval Architecture and Ocean Engineering
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• v.13 no.1
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• pp.194-207
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• 2021

Vortex-Induced Vibration (VIV) is a major contributor to the fatigue damage of marine risers which are often arranged in an array configuration. In addition to helical strakes and fairings, studies have been strived in searching for possible VIV suppression techniques. Inspired by giant Saguaro Cacti, flexible cylinders of different cactus-shaped cross sections were tested in a water tunnel facility, and test results showed that cactus-like body shapes reduced VIV responses of a cylinder at no cost of significant increase of drag. A series of experiments were conducted on a pair of two tandem-arranged flexible cylinders and an array of four cylinders in a square configuration to investigate the effects of wake on the dynamic responses of cylinders and the VIV mitigation effectiveness of the cactus-like body shape. Results showed that the cylinders in a square configuration, either at the upstream or downstream positions, might have larger dynamic responses than those of a single cylinder. The cactus-like body shape could mitigate VIV responses of cylinders at upstream positions in an array configuration; however, similar to helical strakes, the mitigation efficiency was reduced on downstream cylinders. Note that the cactus-like cross-sectional shape investigated was not optimized for VIV suppression. The present study indicates that the modification of the cross-sectional shape of a cylinder to a well-designed cactus-like shape may be used as an alternative technique to mitigate the VIV of marine risers.

• Fashion & Textile Research Journal
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• v.22 no.6
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• pp.812-825
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• 2020

This study compared and analyzed the interaction visual effect of skirt silhouettes and skirt length by body mass index. This study provides basic data for women in their 20s and 30s to choose suitable skirts for their image. Twelve skirts were made, consisting of two categories of body mass index, three types of skirt silhouette and two levels of skirt length. Men and women in their 20s and 30s evaluated the visual effects of the experimental skirts using a questionnaire. The interaction effect of the visual effect following the skirt's length and silhouette by body mass index were analyzed by three-way ANOVA. Overall, a shorter the body and lower body length resulted in better vertical effects in normal weight. In terms of horizontal effects, such as lower body thickness and full-body shape, the 40 cm skirt, 50 cm tight, and A-line skirt were generally shown as better images. Skirt length helped supplement body type rather than silhouette in the overweight section. When the length was 40 cm, three skirts showed a more positive image. This study provide results for women in their 20s and 30s to choose skirts that are suitable for their image.

• Journal of the Korean Society of Clothing and Textiles
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• v.14 no.4 s.36
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• pp.314-323
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• 1990

The purpose of this study is to investigate the visual effect of stripe patterns in one-piece dress. The results of the visual effects are as follows; 1. Comparision with experimental stripe patterns; experimental stripe patterns are likely to appear to be fat and wide in shape, and to be rhythmic, active, modern, unstable, not beautiful and dislike in sense. 2. The correlation between terms; there is a considerable correlation between 'the whole body looks fat 'and' the upper body looks fat'(r=0.84) when experimental stripe patterns are compared with vertical stripe pattern. When experimental stripe patterns compared with horizontal stripe patterns, there is a considerable correlation between 'rhythmic' and 'active' (r=0.90). 3. The results of factor analysis: commonly, factor 1 resulted in character of bodily shape and factor 2 resulted in sensuous charactor.

• Journal of the Korea Society of Computer and Information
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• v.25 no.10
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• pp.211-219
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• 2020

The purpose of this study is to conduct body shape management on women for a certain period of time to determine the structural relationship between the latent variables of life habits, social support, and life satisfaction and the impact on the quality of life. Body shape management was performed with chiropractic adjustments and myofascial relaxation therapy, and a physical therapist with 25 years of experience was used as an expert. The subject of the study was a sample of women in their 20s to 60s residing in Gwangju Metropolitan City, and women who participated in body shape management procedures more than 20 times for the study were asked to fill out a questionnaire using a self-evaluation writing method. The final analysis target was 100 people who made it reasonable to analyze the data. As a result of the study, it was found that the quality of life of women related to health can vary depending on the presence and degree of body shape management. In addition, the degree of life satisfaction varies according to the level of lifestyle and social support, and the direct, indirect, and total effects of the latent variables related to the quality of life were all significant. In this study, the usual body shape management that can improve the quality of life of women gives meaning to the opportunity for women to have desirable lifestyle and to give them a recognition that values quality of life.

• Proceedings of the KSME Conference
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• 2000.04b
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• pp.937-942
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• 2000

The characteristics of spray combustion and dropsize of spray through twin-fluid atomizer was experimentally investigated. The distribution of flame temperature have an effect on the generation of NOx. To investigate there effects, flame temperature with different spray shape was observed. The spray shape was varied by various bluff-bodys. Mean temperature were measured by thermocouple respectively, and NOx concentration was measure by NOx analyser. Distribution of droplet sizes were measured by PMAS. The result showed that the flame with wide distribution has lower temperature and lower NOx emission compared with narrow.

• Fashion & Textile Research Journal
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• v.15 no.5
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• pp.713-721
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• 2013

This study compares the perceived body image of female college students in Korea and Japan as well as explains the difference in the level of self-esteem, body cathexis, body image and fashion leadership based on nationality and body. The sense of fashion leadership affected by these factors was also analyzed. A high ratio of Korean and Japanese female students perceived themselves as obese compared to actual body physique. It was shown that body was highly distorted. They showed a comparatively low level of satisfaction with appearance in contrast to their high interest in their appearance and weight. Thin bodied individuals showed a high level of self-esteem and body cathexis; however, persons with an obese body showed a low level of body cathexis. They showed high interest in appearance regardless of body physique; however, they remain unsatisfied with their appearance. Individuals with an obese body and a standard somatotype showed a high concern with weight. A high fashion opinion leadership was reciprocal to a high interest in appearance and satisfaction with appearance. Korean female students showed an indirect positive effect on fashion opinion leadership through body cathexis, self-esteem, interest in appearance, and satisfaction with appearance. A thin body showed a positive effect on fashion opinion leadership and an obese body had a negative effect. Fashion innovativeness was directly influenced persons with a high degree of self-esteem and interest in appearance. Japanese female students were directly affected by fashion innovativeness; however, Korean female students were indirectly affected by fashion innovativeness through self-esteem and interest in appearance.

• International Journal of Naval Architecture and Ocean Engineering
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• v.5 no.3
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• pp.404-413
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• 2013

In the present study, a towed underwater particle image velocimetry (PIV) system was validated in uniform flow and used to investigate the free-surface effects on the turbulent wake of a simple surface-piercing body. The selected test model was a cylindrical geometry formed by extruding the Wigley hull's waterplane shape in the vertical direction. Due to the constraints of the two-dimensional (2D) PIV system used for the present study, the velocity field measurements were done separately for the vertical and horizontal planes. Using the measured data at several different locations, it was possible to identify the free-surface effects on the turbulent wake in terms of the mean velocity components and turbulence quantities. In order to provide an accuracy level of the data, uncertainty assessment was done following the International Towing Tank Conference standard procedure.

• Korean Journal of Health Education and Promotion
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• v.19 no.1
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• pp.59-85
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• 2002

The purpose of this study was to examine the health promoting behavior of university students and its related factors. A self-administered questionnaire survey was carried out for 1,031(male, 477, female, 554) students from 7 universities in Taegu from March 10 to April 15 2000. Collected data were analyzed by the $X^2$-test, t-test, ANOV A and structural equation modeling analysis. The results of this study were as follows; Mean score of health promoting behavior of women was higher than mean score of men(p〈0.01). According to the subordinate fields, female students showed significantly higher scores in the fields of stress management, nutrition, personal relations and alcohol-cigarette(p〈0.05). And in male students, the only fields of exercise had meaningfully higher score(p〈0.01). The highest degree of performance was marked in alcohol-cigarette field in female, and interpersonal field in male. In Both male and female students, the lowest field was health responsibility. The mean score of health promoting behavior showed significant differences in intermediating factors such as age, health education and grade in male, and such as grade, pocket money for a month, taking health education, perceived body shape and gastrointestinal symptoms in female(p〈0.05). The mean score of health promoting behavior showed significant differences in cognitive-perceptual factors and cues to action such as perceived health status, perceived benefits, perceived barriers, and health concern of parents in both male and female(p〈0.05). By the results of structural equation modeling analysis in male students, the economic status, gastrointestinal symptoms and perceived body shape as lean had significant direct effects on cognitive-perceptual factors($\mid$T$\mid$〉2.0). Grade and health concern of parents had significant direct effects on health promotion behaviors($\mid$T$\mid$〉2.0). In female students, perceived body shape as lean and perceived body shape as fat had significant direct effects on cognitive-perceptual factors($\mid$T$\mid$〉2.0). Grade, pocket money and health concern of parents had significant direct effects on health promotion behaviors($\mid$T$\mid$〉2.0). On the consideration of above findings, it is recommended that perceived health status and perceived benefits should be raised and perceived barriers should be lowered to increase health promoting behaviors, by means such as institutional approach which can enhance the primary prevention for a disease. In addition, the health policy for improving parents' concern about health as well as university students, through various ways such as health education, consulting, and health program, should be employed.