• The Research Journal of the Costume Culture
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• v.18 no.6
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• pp.1063-1075
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• 2010

Studying awareness, importance, satisfaction, and wearing behavior of functional textiles for active silver generation related with gender and age is expected to contribute to clothing products development to improve and maintain their health and marketing strategy fit for user characteristics. For empirical research, a survey was developed and the aged 50 and above were 332 respondents. The results of the study are as follows. First, silver generation considered all the clothing comfort sensations important when wearing clothes, such as tactile sensation, clothing pressure sensation, thermal/wet sensation, and motion sensation in human physiological aspect. Also, stretchy fabrics were ranked first in awareness, the number of wearing times, and satisfaction of comfort functional fabrics. More than 30% of silver generation have fifteen items out of 36 functional clothes. Second, in analysis of awareness by gender on functional clothing products, women were more aware of health/safety-oriented fabrics than men were. Otherwise, men had more knowledge about the water-related properties of functional fabrics than women have, such as water/moisture absorptive and water-repellent/vapor permeable fabrics. While women have more indoor casual wear, men had more active sportswear. Also, women expressed a strong preference to the stretchy function of fabrics.

• Transactions of the Korean Society of Automotive Engineers
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• v.6 no.4
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• pp.76-85
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• 1998

Recently, Genetic Algorithm(GA) is widely adopted into a search procedure for structural optimization, which is a stochastic direct search strategy that mimics the process of genetic evolution. This methods consist of three genetics operations maned selection, crossover and mutation. Contrast to traditional optimal design techniques which use design sensitivity analysis results, GA, being zero-order method, is very simple. So, they can be easily applicable to wide area of design optimization problems. Also, owing to multi-point search procedure, they have higher probability of converge to global optimum compared to traditional techniques which take one-point search method. In this study, a method of finding the optimum values of suspension parameters is proposed by using the GA. And vehicle is modelled as planar vehicle having 5 degree-of-freedom. The generalized coordinates are vertical motion of passenger seat, sprung mass and front and rear unsprung mass and rotate(pitch) motion of sprung mass. For rapid converge and precluding local optimum, share function which distribute chromosomes over design bound is introduced. Elitist survival model, remainder stochastic sampling without replacement method, multi-point crossover method are adopted. In the sight of the improvement of ride comfort, good result can be obtained in 5-D.O.F. vehicle model by using GA.

• Fashion & Textile Research Journal
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• v.13 no.5
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• pp.686-694
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• 2011

The purpose of this study was to understand the preferences of the uniform design for the preschool student's parents. 97 parents became subjects for the research and questionaries were analysed by distribution of frequency and percentage using SPSS V. 18.0. The results of this study could be summarized as followings. First, most of the parents preferred to wearing preschool uniform and expected further improvement in function, material and design. Second, the preferred form was semi formal style consisting of shirt, knit vest, knit cardigan, and coat. Third, the preferred colors were the mixing together bright colors and quiet colors in vivid and pastel tone. Fourth, functional materials to comfort in children's physical activities and to serve convenience in cleaning were preferred. In Conclusion, the preferred design characteristics were combined function to enhance comfort and convenience in children's physical activities with esthetics to present loveliness and modesty as preschool students.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.2
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• pp.220-230
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• 2005

The purpose of this study was to compare clothing benefits and the types of fashion information sources according to family life cycle. Subjects were selected through stratified sampling technique in Seoul and suburban area. Collection of the research data was made using a self-administered questionnaire survey. Factor analysis, ANOVA, and Duncan test were used to conduct the data analysis on 562 out of 600 questionnaires. Clothing benefit variables were reduced to five factors : fashion/social status, individuality, function/comfort, figure flaws compensation, and economic value. The result showed significant differences on 3 clothing benefits(fashion/social status, individuality, and function/comfort) and 5 fashion information soures (celebrities, street fashion, T.V commercial, Internet/home shopping, fashion catalog) according to family life cycle.

• Journal of the Korean Home Economics Association
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• v.39 no.7
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• pp.115-124
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• 2001

The purpose of this study was to analyse on the clothing practice of automaker's uniform and to investigate the relationship between wearing sense of worker's uniform and overall comfort according to working environment and working types. The data were collected from 184 automakers using questionnaire and interview of a officer for uniform management. Working environment was relatively comfortable, but the worker in special working area needed to control the working environment and adopted the protective equipment. The dissatisfaction of clothing practice of uniform was shown high in design and material. The order of preference in the color was blue, navy, blue, gray, green. In case of taking care of uniform, sewing durability and shape stability were poor in comparison with washing easiness. The correlation between overall comfort and wearing sense of uniform as sense of wearing and taking off, texture and movement function, was relatively high, but it appeared the low correlation in physiological comfort.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.1943-1950
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• 2010

Superimposition of horizontal and vertical curves may hamper the ride comfort and the running stability of train and largely affect the maintenance cost. However, in many cases, it's not easy to make a track plan because of the fixed points (bridge, tunnel, turnout, catenary system, etc.) to be avoided due to the geographic conditions or to be passed for utilization of existing structures. In this study, when the horizontal and vertical curves are superimposed, in order to optimize the horizontal curve in aspect of the ride comfort, the object function $P_{CT}$ was developed and verified by vehicle dynamic analysis. Also, the solution algorithm for simplified evaluation method was presented.

• Fashion & Textile Research Journal
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• v.20 no.4
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• pp.474-481
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• 2018

For this study, we developed clothing in which textile materials that were excellent weather control function for the cold environment and we performed the human subject test with developed clothing to determine the thermal comfort. We used 2 clothing samples developed (A and B, hollow yarn+moisture absorption/quick drying yarn, 3 layers, high stretchable, heat reflection film and lamination treated) and a control sample (Ctrl.) for the human subject test and 8 adult males were used as a human subjects and environmental conditions of chamber were $0{\pm}1^{\circ}C$. $50{\pm}5%RH$, 0.3m/sec. The results were as follows: The average skin temperature and hand, thigh temperature of B were higher than B and Ctrl. (p<.05). The micro-climates of B were near to thermal comfort range which is $32{\pm}1^{\circ}C$ and $50{\pm}10%\;RH$. The chest temperature of B was significantly higher than others (p<.05). The relative humidity of B was lower than others and kept stable rather than others. The thermal sensation of B was near the "neutral" and was significantly different from Ctrl. (p<.01) and the weight loss of B was lower than Ctrl. (p<.05). The counting task and hand temperature was positively related and the counting task value of B and A is bigger than Ctrl. and that of A was bigger than Ctrl. (p<.05).

• Journal of the Korean Society of Clothing and Textiles
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• v.39 no.4
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• pp.560-575
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• 2015

This study developed brassieres using a suspension system with the elastic panel on the inside of the brassiere cup to replace the wires for 20s women with large and elongated breasts. The following results were obtained by analyzing clothing pressure and a subjective evaluation of brassieres with elastic panels at the bottom or side of the various reduction ratios and with the shoulder straps of the brassiere. Brassieres with dual panels (rather than with only the bottom panel) lowered clothing pressure as well as improved wearing comfort and function. Compared to brassieres with a panel of 10%, brassieres with a panel of 15% lowered clothing pressure and provided superior wearing comfort. In this case, the higher the reduction ratio of the side panels increased clothing pressure on the shoulder, but provided superior well-fit, bust-up, and vibration restraint. To reduce the reduction ratio of the side panel decreased clothing pressure on the shoulder and decreased support functions. Therefore, the reduction ratio of the side panels should be determined by preferable functions such as wearing comfort that depend on the needs of the wearer. It is suggested that a brassiere with a dual elastic panel can replace the brassiere wire.

• Korean Journal of Human Ecology
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• v.9 no.4
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• pp.41-53
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• 2006

The purpose of this study was to compare the characteristics of underwear consumer's underwear purchasing behavior through survey. 630 questionnaires were distributed in Seoul and Chonju and 618 with usable data were analyzed frequency and factor analyses, t-test etc. using SPSSWIN 10.0. program. The results were summarized as follows : Most male consumers buy underwears at discount stores whereas most female consumers at chain store. Throughout all four seasons, more male and female consumers do not wear heat-retaining underwears. Most male and female consumers do not have function-fiber underwears nor functional-finishing and natural-dyeing-treated underwears. Most consumers are not satisfied with these underwears. The most important criteria for most male consumers to choose underwears are comfort levels while in action, the sense of touch, comfort levels while wearing them while not in action, pleasance levels; whereas for females are comfort levels while in action, and comfort levels while wearing them while not in action. Male consumers prefer a little bigger-than-their-bodies size, dry and soft fabrics, plain white color; whereas female consumers prefer a little tight size, dry and soft fabrics and plain beige color, Most consumers want to buy functional-fiber underwears made of yellow- soil-and-charcoal-dyeing fabrics which has jade.

• Journal of the Korean Society for Railway
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• v.13 no.6
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• pp.552-558
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• 2010

Ride comfort of railway vehicles is affected by many factors, such as vibration, noise, smell, temperature, visual stimuli, humidity and a seat design. In general, vibration, which originates from vehicle motion, is considered as the primary concern. In evaluating the ride comfort, relationship between passenger's feeling and vibration characteristics is very important because human feeling is dependent on frequency spectrum of vibration. Therefore, the weighing functions in frequency domain are used to evaluate the ride comfort of railway vehicles. In the present paper, we have analyzed the characteristics of the frequency weighting curves defined in many standards and reviewed the effect resulting from their difference on the ride comfort.