• The Research Journal of the Costume Culture
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• v.12 no.4
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• pp.638-647
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• 2004

This study surveyed some general fit problem of the ready-to-wear slacks of women in 20＇s. A questionnaire survey was administered to 80 women in 20＇s. 14 body dimensions were measured fer 53 women among the subjects who participated in this survey. Their anthropometric data were analyzed and the difference between actual and perceived body shape was compared. The results of this study showed that the subjects experienced poor slacks fit at thigh, crotch, and hip areas. Occasionally subjects altered the waist size of slacks after purchasing them. Despite the subjects＇ waist measurement was ranged from 22 to 33 inches, most of them purchased slacks with size 26 or 27 inches. The researchers claimed that the manufacturers did not provide various slacks sizes for women in 20＇s. The subjects, who had problems with poor slacks ft, preferred to buy customized slacks. The most of subjects preferred to buy mass customized slacks to have chance to choose their own style from pool of various styles. The subjects tended to perceive their body size larger than actual at hip and thigh. The most critical body dimension reflected their perception on lower body fitness was waist circumference.

• Fashion & Textile Research Journal
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• v.17 no.4
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• pp.626-634
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• 2015

This study analyzes the wearing and purchasing conditions of outdoor jackets by senior men who are over 50s, and examines product sizes of outdoor jackets in the market. A total of 134 questionnaires and sizing systems (or product size) of 10 outdoor brands were used as analytical data. The results were: a high number of senior men enjoyed hiking as an outdoor activity, with most of them following this activity1-3 times per month and as a preferred personal activity for over 5 years. Most needed outdoor wear suitable for these daily life activities. Outdoor wear satisfaction tends to decrease as people age. The major reason for the dissatisfaction with outdoor wear was price. Senior men aged 50s and 60s emphasize design and color when purchasing outdoor wear; however, men in their 70s considered price a priority. Senior men preferred outdoor brands based on a comfortable fit. An investigation on 10 outdoor brands indicated that they had not designated a specific target customer. A comparison of the product size of outdoor jackets with a similar silhouette indicated some deviations among sizes; however, the age of customers was not considered. The human body tends to shrink in stature and increase in girth as a person ages; consequently, we need to reflect body shape changes and senior's size in outdoor wear.

• Journal of Korean Society for Atmospheric Environment
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• v.28 no.2
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• pp.131-141
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• 2012

A large fraction of urban $PM_{10}$ concentrations is due to non-exhaust traffic emissions including road dust, tire wear particles, and brake lining particles. Although potential health and environmental impacts associated with tire wear debris have increased, few environmentally and biologically relevant studies of actual tire wear debris have been conducted. Tire wear particles (TWP) are released from the tire tread as a result of the interaction between the tire and the pavement. Roadway particles (RP), meanwhile, are particles on roads composed of a mixture of elements from tires, pavements, fuels, brakes, and environmental dust. The main objective of present study is to identify the contribution of tires to the generation of RP and to assess the potential environmental and health impacts of this contribution. First, a mobile measurement system was constructed and used to measure the RP on asphalt roads according to vehicle speed. The equipment of the mobile system provides $PM_{10}$ concentrations by Dusttrak DRX and number density & size distribution measurements of fine and ultra-fine particles by a fast mobility particle sizer (FMPS) and an aerosol particle sizer (APS). When traveling on an asphalt road at constant speed, there is a clear tendency for $PM_{10}$ concentration to increase slightly in accordance with an increase in the vehicle speed. It was also found that considerable brake wear particles and particles from tire/road interface were generated by rapid deceleration of the vehicle. As a result, the $PM_{10}$ concentration and particle number of ultra-fine particles were measured to be very high.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.499-500
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• 2006

The electrode wear in micro-EDM significantly deteriorates the machining accuracy. In this regard, electrode wear needs to be compensated in-process to improve the product quality. Therefore, there are substantial amount of research about electrode wear. In this study a control method for micro-EDM using discharge pulse counting is proposed. The method is based on the assumption that the removed workpiece volume is proportional to the number of discharge pulses, which is verified from experimental results analyzing geometrically machined volume according to various number of discharges. Especially, the method has an advantage that electrode wear does not need to be concerned. The proposed method is implemented to an actual micro-EDM system using high speed data acquisition board, simple counting algorithm with 3 axis motion system. As a result, it is demonstrated that the volume of hole machined by EDM drilling can be accurately estimated using the number of discharge pulses. In EDM milling process a micro groove without depth variation caused by electrode wear could be machined using the developed control method. Consequently, it is shown that machining accuracy in drilling and milling processes can be improved by using process control based on the number of discharge pulses.

• Tunnel and Underground Space
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• v.34 no.2
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• pp.154-168
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• 2024

The Tunnel Boring Machine (TBM) disc cutter is subjected to wear and damage during the rock excavation process, and the worn disc cutter should be replaced on time. The manual inspection by workers is generally required to determine the disc cutter replacement. In this case, the workers are exposed to dangerous environments, and the measurements are sometimes inaccurate. In this study, we developed a technology that measures the disc cutter wear in real time. From a series of laboratory tests, a magnetic sensor was selected as the wear sensor, and the real-time disc cutter measurement system was developed integrating wireless communication modules, power supply and data processing board. In addition, the measurement system was verified in actual TBM excavation circumstances. As a result, it was confirmed that the accuracy and stability of the system.

• Journal of Oral Medicine and Pain
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• v.33 no.3
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• pp.269-277
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• 2008

The purpose of this study was to estimate occlusal tooth wear and bruxism severity in TMD patients, and evaluate the effectiveness of the present age estimation method by occlusal tooth wear in TMD patients. Takei's age estimation method was applied to 163 subjects(56 controls, 107 TMD patients). The author analyzed the degree of occlusal tooth wear from the difference between estimated age and actual age. The obtained results were as follows: 1. In all age group, occlusal tooth wear in TMD patients is higher than those in asymptomatic controls. In 20's age group, a statistically significant difference was found. 2. In both gender, occlusal tooth wear in TMD patients is higher than those in asymptomatic control. In male, a significant difference was found. 3. Occlusal tooth wear in TMD patients with bruxism is significantly higher than that in control. 4. We found no significant difference in bruxism severity and occlusal tooth wear among the RDC/TMD subgroups. 5. Application of Takei's method would be still useful for age estimation in Korean. In case of age estimation of TMD patients using occlusal tooth wear, evaluation of the bruxism severity and appropriate correction according to age, sex and difference of geographical location should be considered.

• Journal of Fashion Business
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• v.18 no.1
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• pp.80-100
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• 2014

As men have started to show more desire to express themselves through clothing and accessories also they learn by themselves and take diverse experiences about fashion. At the same time, men's fashion-consciousness is growing together. The role of male consumers' is becoming significant in the fashion market, and there has been more research on their clothes and fashion is increasing, however research on the male casual clothing for their 30~49 years old group is still insufficient. This study aims to examine the casual brands for men in their 30~40s and their characteristics among other men's brands recently appearing in Korea. The results of the study found: first, regarding the questionnaire to give men's casual brand names, 30s males' answers showed clearer recognition about the casual brand than those of 40s males. secondly, the factors affecting attitude of male consumers' towards casual brands are designed 'aesthetics', 'surroundings' and 'price', and the men in their 40s put more important than men in their 30s on 'aesthetics' and 'surroundings'. third, when men were actually buying casual brand, they then took five characteristic factors into account namely: 'the external environment', 'functionality' design 'aesthetics', 'symbolic' and 'price'. Men in their 30s did not show much difference in actual purchase characteristics in regards for the brand factors but men in their 40s showed interest when asked about 'buying product with noticeable brand logo or trademark' item among 'symbolic' factors than men in their 30s (p< .01 of significant difference).

• Korean Journal of Human Ecology
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• v.5 no.1
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• pp.43-53
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• 1996

The purpose of this study was to investigate the actual condition of fashion sales related persons and analyze their different role recognition in women's Ready-To-Wear shops. A questionnaire was administered to 378 fashion sales related persons in department stores and individual shops. Data were analyzed by using crosstabs, $X^2$, t-test, Scheffe's test and ANOVA by using of SPSS PC program. The results of this study were as follows: 1. In the role of fashion salespersons, managers participated highly in the merchandise buying plan, actual merchandise buying and advertisement, and shopmasters participated in the management of salespersons and keeping good relation with customers and display. 2. There was significant difference according to the existence of shopmasters in sales promotion. Shops with shopmasters had regular sales and filed up customer cards. 3. Shopmasters and salespersons attached importance to fashion information, market information, sales result information, and managers attached importance to customer information, enterprise environment information in utilizing of informations. Managers considered customer survey very important but shopmasters and salespersons did not. Shopmasters, managers, and salespersons all attached importance to customers' preference survey as customers' information source. 4. There were significant differences in lifestyle survey, buying method survey, preference survey, street fashion survey, brand identity survey and advertizement effect survey of customers by the different roles of fashion salespersons. 5. There were significant differences in the degree of merchandise knowledge, service and after service in sales service recognition by the different roles of fashion salespersons.

• Transactions of the Korean Society of Automotive Engineers
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• v.20 no.6
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• pp.24-32
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• 2012

A large fraction of urban $PM_{10}$ concentrations is due to non-exhaust traffic emissions including road dust, tire wear particles, and brake lining particles. Although potential health and environmental impacts associated with tire wear debris have been increased, few environmentally and biologically relevant studies of actual tire wear debris have been conducted. Tire wear particles (TWP) are released from the tire tread as a result of the interaction between the tire and the pavement. Roadway particles (RP), meanwhile, are particles on roads composed of a mixture of elements from tires, pavements, fuels, brakes, and environmental dust. The main objective of present study is to identify the contribution of tires to the generation of RP and to assess the potential environmental and health impacts of this contribution. First, a mobile measurement system was constructed and used to measure the roadway particles on asphalt road according to vehicle speed. The equipment of the mobile system provides $PM_{10}$ concentrations by Dusttrak DRX and number density & size distribution measurements of fine and ultra-fine particles by a fast mobility particle sizer (FMPS) and an aerosol particle sizer (APS). When traveling on an asphalt road at constant speed, there is a clear tendency for PM10 concentration to increase slightly in accordance with an increase in the vehicle speed. It was also found that considerable brake wear particles and particles from tire/road interface were generated by rapid deceleration of the vehicle. The morphology and elements of the roadway particles were also analyzed using SEM-EDX technique.

• Journal of Fashion Business
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• v.12 no.4
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• pp.88-98
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• 2008

In order to improve the problems with obese women's ready-to-wear by age range, this study surveyed the actual clothing purchase and wearing of women in their 20s and 30s with normal and obese body types, and compared and analyzed their satisfaction with ready-to-wear by age and body type. First, for normal body types, both women in their 20s and 30s use department stores the most. Meanwhile, obese women in their 20s make most of their purchases at internet shopping malls, while those in their 30s mostly go to department stores. For criteria for purchasing clothing, normal women both in their 20s and 30s value design most whereas, obese women put size and fit before design regardless of their age. Normal women in their 20s and 30s both were most unsatisfied with standardized design because they could not find designs they wanted. Obese women in their 20s and 30s also showed disapproval of unvaried sizes, indicating a distinct difference in body types and age. As well, the study found that both normal and obese women wear casual style the most, followed by semi-formal style. Also, regarding the images they were seeking when wearing clothing, the normal women wanted to look fashionable, while obese women wanted to look slim, regardless of age. Both body-type groups generally like preferred semi loose-fits the most, followed by tight-fit. They however, dislike relaxed loose-fitting.