• Journal of Aerospace System Engineering
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• v.4 no.4
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• pp.1-10
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• 2010

The basic factor that affect wear performance is the wear characteristics, which come from sliding friction between rubber compound and road. Thus, this study focused on friction and wear of rubber. This paper briefly explain some characteristics of friction and wear referring to the papers on wear of rubber that scholars researched on. Research activities to predict the performance of the rubber wear is also explained.

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.6
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• pp.838-849
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• 2000

The purpose of this study was to investigate use and purchase behavior of sleeping wear for summer. Subjects in this study were composed of 591 males and females aged from twenties to fifties, living in Taejon and Chongju. For data analysis, descriptive analysis, $\chi$$^2$-test, t-test, ANOVA, and factor analysis were used. The results are as follows. First, subjects used sleeping wear(a night gown and pajamas), and home wear(T-shirts and sweat suit with zippered top) with similar rates. The subjects, who are females, married, older and have professional jobs, owned sleeping wear such as a night gown and pajamas more than home wear. Also, the mean of using pajamas was the highest, and they were satisfied with them more than others who didn't wear them. Second, one-third of consumers purchased sleeping wear once a year in a specialty store. Consumers mainly searched for information regarding sleeping wear in the display section. Most consumers weren't influenced by others when they made their purchases. When consumers decided to purchase a product, they considered six criteria such as fabric/management, wearing/fitness, esthetic, service, symbolic status, and economic for evaluating. Among them, the factor wearing/fitness was considered the most important. These results imply that consumers would be conscious of sleeping wear even though sleeping wear and home wear are used interchangeably. In addition, consumer behavior concerning sleeping wear is different from their characteristics such as sex, age, occupation, the level of education, and marital state. Therefore, the markets with sleeping wear would be able to be segmented based on consumers’characteristics. Also, marketers should focus on distribution channels to reform the markets of sleeping wear, that is, they may offer products in specialty stores. Additionally, market managers would be able to concentrate on visual merchandising in stores in order to increase brand awareness and market share.

• Korean Journal of Applied Biomechanics
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• v.21 no.3
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• pp.345-352
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• 2011

The purpose of this study was to determine how spandex wear with compressive band affects biomechanical parameters during a golf swing. Nine male golf players, each with at least 6 years golf experienc(handy 4.5${\pm}$5.4), were recruited as the participants. Eight pairs of surface electrodes were attached to the left and right side of the body to monitor the pectoralis major(PM), external abdominal oblique(AO), erector spinae(ES), and vastus lateralis(VL). This study showed that the angular velocity of the club in EG were increased during the down swing phase but X-Factor and X-factor Stretch were reduced. Average and maximum nEMG (normalized EMG) values of the left AO(external abdominal oblique) were less in EG(experimental group) compared with CG(control group) during the back swing, whereas those of left PM(pectoralis major) in EG were greater than CG. It is more likely that EG performed effectively golf swing without excess muscle activity. Thus, the spandex wear with compressive band played an important role in improving swing performance with injury prevention. This has led to suggestions of the need for further kinetic and kinematic analyses to evaluate its function.

• Korean Journal of Human Ecology
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• v.22 no.4
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• pp.637-650
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• 2013

The purpose of this study was to examine the consumers' image and factors of wear comfort, expectation and satisfaction levels of wear comfort of hiking gear in order to investigate the consumer perception of wear comfort of hiking gear. The questionnaires were distributed to 400 people in their 40s and 50s and, 260 of which were used to data analysis. The questionnaires were comprised of questions about the image, factors, expectation and satisfaction levels of wear comfort of hiking gear, and demographic characteristics. Data were analyzed by frequency analysis, factor analysis, reliability analysis, correlation analysis, ANOVA, Duncan test, T-test with SPSS 19.0 IBM for Windows. In demographic characteristics, 43.5% of respondents were male and people under 45 years of age were at 17.7%, those between 46 and 50 with 46.5%, those between 51 and 55 with 28.9%, those between 56 and 60 with 6.9%. The results of this study are as follows. Responses of male and female consumers to image of wear comfort were similar and ten or more mentioned reponses by men were well-being and freedom from pain, stretchability, light weight, absorption of sweat, softness. Wear comfort of hiking gear was shown to include mobility/pressure factors, moisture factor, psychological factor, tactile/keeping body temperature factors. It was shown that the expectation and satisfaction levels of wear comfort of hiking gear were relatively high and were not influenced by consumer's sex and age, but were affected by the objective of mountaineering.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.33 no.1
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• pp.82-88
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• 2009

A disadvantage in the design of gerotor pump is a lack of parts that can be adjusted to compensate for wear in the rotor set, and as a consequence, it causes a sharp reduction of efficiency. In this paper, an attempt has been made to reduce the wear rate between the rotors of a gerotor pump. To do this, floating genetic algorithm (FGA) is used as an optimization technique for minimizing the wear rate proportional factor (WRPF). The result shows that the wear rate can be reduced considerably, e.g. approximately 8% in this paper, throughout the optimization using FGA.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.25 no.6
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• pp.930-937
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• 2001

The friction and wear behavior of short carbon fiber reinforced polyetheretherketone was studied experimentally under dry sliding conditions against SCM440(AISI 4140) disks with different surface roughness and hardness at the low sliding speeds and the high pressures on a pin-on-disk apparatus. Under the low disk surface roughness value the earsplitting noise and stick-slip were occurred. The increased adhesion friction and wear factor with stick-slip made the friction and wear behavior worse. Under the high disk surface hardness the break and falling-off of carbon fibers were accelerated. The carbon fibers fallen off from the matrix were ground into powder between two wear surfaces and this phenomenon caused abrasive friction and wear factor to increase. So the friction and wear behavior became worse. With the transfer film made of wear particles formed on a disk, the carbon powder film formed on a pin lowered a friction coefficient.

• Journal of the Korean Society of Clothing and Textiles
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• v.37 no.4
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• pp.565-576
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• 2013

This study investigated 1) the effects of mountain climbing motivation on the desired mountain climbing wear benefits, and 2) the desired effects of mountain climbing wear benefits on clothing usage behavior. Data were collected via a questionnaire administered to 498 consumers who make at least one mountain climbing wear purchase for personal use. All items were evaluated on a 5-point Likert scale, and SPSS 20.0 and Amos 7.0 were used for data analysis. Confirmatory factor analysis for the research variables were performed and three factors of mountain climbing motivation (social interaction, health improvement, and mental rejuvenation), four factors of mountain climbing wear benefits sought (ostentation, ideal healthy figure, conformity, and functions), and two factors regarding clothing usage behavior (sportswear usage and daily wear usage) were identified. The results from the model test were as follows: 1) Mountain climbing motivation was found to vary depending on the mountain climbing wear benefits sought. Social interaction had a positive effect on all 4 factors of mountain climbing wear benefits sought. Health improvement was the only motivating factor for consumers who sought the benefit of functions; however, the functions benefit was not found to be a consideration for consumers who climbed for mental rejuvenation. 2) Mountain climbing wear usage was affected by mountain climbing wear benefits sought. The benefits for conformity and functions had a positive effect on sportswear usage and daily wear usage; however, the ideal healthy figure only affected daily wear usage. The twofold usage of mountain climbing wear reflects a cultural trend toward the usage of mountain climbing wear as daily wear; however, consumers show this twofold usage to conform successfully to mainstream society and not to pursue the ideal healthy figure.

• Journal of the Korean Society for Precision Engineering
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• v.28 no.9
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• pp.1062-1069
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• 2011

In electro-galvanizing line to manufacture the electro-galvanized steel sheet, polishing system is required to maintain clean surface of conductor roll and to secure the quality of the steel sheet. At the same time, prediction and decision of the replacement cycle for felt material and its brush installed in the polishing system is also important because the brush is directly contacted on the conductor roll surface. In this study, the polishing system has been designed which the brush is repetitive translating according to the longitudinal direction of the conductor roll. Furthermore, the prediction on the wear-life of the felt material used for the brush is performed using the contact pressure extracted by finite element analysis. And to verify the predicted wear-life of the felt material, the experimental study is also carried out. From the comparison result between the predicted and the measured wear-life of the felt material, it is presented that the wear-life and the replacement cycle of the felt material are well predicted by considering a wear compensation factor, and the wear compensation factor is useful and reasonable.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.3_4 s.141
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• pp.523-534
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• 2005

This study was to examine the factor structure of pursuing benefit and satisfaction at casual and official wear, to analyze the differences of pursuing benefit, satisfaction, and clothing purchase behavior among the consumer groups segmented by store pursuing benefits, and to provide useful information for establishment of marketing strategies. The subjects were 500 female consumers experienced in purchasing clothes at fashion outlet stores. A total of 500 questionnaires were analyzed with $X^2$-test, ANOVA, factor analysis and Duncan's multiple range test. The results were as follows: 1. Pursuing benefit and satisfaction at casual wear and official wear were composed of 5 factors. 2. Pursuing benefit and satisfaction at casual and offcial wear, and clothing purchasing behavior variables such as informants, frequency of purchase, shopping time, and average monthly expenditure on clothes were significantly different among the 3 segmented groups. Product pursuing group was shown to seek higher level of esthetic feeling, suitability for self image and body, fsshion and symbolic meaning of brand than other groups in casual and official wear and to be most satisfied at symbolic meaning of brand, social recognition, and practicality in casual wear of outlet and at suitability and social recognition in official wear of outlet. Store convenience pursuing group was shown to seek higher level of suitability for self image and body, quality, and practicality than other groups in casual and official wear and to be most satisfied at quality and practicality in casual wear of outlet and at practicality and suitability in of cial wear of outlet. Price pursuing group was shown to seek and to be most satisfied at practicality in casual and official wear of outlet.

• Journal of Korea Foundry Society
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• v.3 no.2
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• pp.92-99
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• 1983

This study has been carried out to investigate into the difference of rolling life and rolling wear characteristics for various gray cast iron under unlubricated dry rolling condition by amsler type wear test with 9.09% sliding.The results obtained from this study are summerized as follows: 1) It has been found that the amount of rolling wear id decreased when tensile strength and hardness are low, and then the rolling life up to generation of abnormal wear is conspicuously increased. 2) At the given condition the amount of rolling wear has been found to decrease as carbon equivalent of gray cast iron increases and resistance of crack propagation is an important factor on improvement of wear characteristics. 3) The amount of rolling wear is increased with increasing rolling revolution and wear of gray cast iron under dry rolling condition is characterized by three modes; initial wear, stationary wear and abnormal wear. 4) It has been found that the amount of rolling wear is increased with increasing maximum compressive stress and extremely increased when maximum compressive stress is over 59.1kg.f/mm.