• 한국터널지하공간학회 논문집
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• 제19권1호
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• pp.57-70
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• 2017

본 연구에서는 광산이나 오일샌드 등의 분야에서 적용되고 있는 슬러리 파이프 마모량 측정 방법과 슬러리 파이프의 마모량 예측에 관련된 이론식들을 문헌연구를 통해 살펴보고, 실제 싱가포르 슬러리 쉴드 TBM 현장에서 주기적으로 측정한 직선부 슬러리 파이프의 두께 측정 자료로부터 평균 일일 마모율과 굴착거리당 마모율을 산정하였다. Bukit Timah Granite의 풍화등급에 따른 마모율을 구하였는데, 풍화토에 가까운 G (V) 등급 지반 및 G (III)/G (V)의 복합지반에서의 마모율이 G(I)~G (IV)의 암반 등급지반에 비해서 1.5배 높게 나타났다. 슬러리 파이프 마모율은 슬러리 운송속도에 비례하여 증가하는 경향을 보였다. 향후 지반특성 별 파이프 마모율과 합리적인 관리두께 선정을 통하여 보다 최적화된 슬러리 파이프의 교체 및 회전 주기를 산정할 수 있을 것으로 판단된다.

• 한국의류산업학회지
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• 제25권2호
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• pp.165-174
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• 2023

This study analyzed the purchase status of athleisure wear and consumers' dissatisfaction with online shopping post-COVID-19. The target population comprised female consumers in their 20s to 50s who are interested in exercise and fashion. The study investigated differences according to age. It was found that athleisure wear was purchased once every two to three months and used as sportswear and/or daily wear. Purchase information was obtained via the Internet, and purchases were made online. Design, price, wear sensation, and textiles were the most important selection criteria, and T-shirts and leggings were the most frequently purchased garments. Additionally, textile characteristics such as moisture-absorbing and quick-drying as well as elasticity were evaluated as important. Online shopping of athleisure wear has increased since COVID-19 due to the time savings, low price, opportunity to compare several products, and delivery convenience. However, consumers were dissatisfied due to the differences between the screen image and the actual product, the inconvenience of returns, exchanges, and refunds, the lack of product information, product quality, and delivery. Furthermore, it was found that pursuing value of athleisure wear differed according to age. Consumers in their 20s and 30s required athleisure wear with the characteristics of sportswear and daily or urban wear and those in their 40s and 50s required garments with good performance as sportswear. Based on consumer feedback, it is necessary for manufacturers to provide product information that can improve product reliability.

• 한국의류학회지
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• 제40권3호
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• pp.516-525
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• 2016

Lumbar discs are one of the first parts of the musculoskeletal system to age in the human body. Lumbar disc for females start to age at twenty years of age and completely age between fifty and sixty. The number of lumbar herniated intervertebral disc patients are increasing rapidly; however, studies on protective inner wear are insufficient. This study was conducted to develop protective inner wear equipment that retains an aesthetic appreciation of the body. The methods and procedures of this study are as follows. First, foreign and domestic lumbar pads were researched and analyzed by visiting medical shops and internet shopping malls that sell lumbar pads. Second, the survey was conducted on forty patients with disc disease in hospitals located in Seoul and surrounding suburbs. The following are the study results and observations. First, the lumbar pads selling on the market had a variety of designs, textiles, and fabrics. The result of the research was to develop additional inner protective equipment for lumbar herniated intervertebral disc patients. Second, the survey results of the forty patients with disc disease were that housewives were the most vulnerable. All patients had experience purchasing lumbar pads. The prevention of pain and stress were the most selected responses for the motivation to buy lumbar pads. Most individuals said that they used lumbar pads for less than 1 year. Dissatisfaction came from fabric, activity and design. 'Being uncomfortable to wear' was the most common complaint. 'Protection and how easy the clothes were to wear' were the most selected for the necessity of developments. The Inner wear shape was the most selected in shape. Except for six respondents, all favored the lumbar protective inner wear design.

• 한국의류학회지
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• 제36권1호
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• pp.84-98
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• 2012

This study examines the children's wear purchasing behavior of younger generation women (the missy group) and in the new-silver generation (retired). The data collected in the study were examined with a view to establish effective marketing strategies within the children's wear market, a market where the age and characteristics of the actual purchasers of the products have become more diverse. A descriptive survey method using a self-administered questionnaire was employed. The sample consisted of 398 females between the ages of 28 and 64 residing in Seoul and the Gyeonggi-do area. Data collected were analyzed by frequency, t-test, ANOVA, factor analysis, cluster analysis, and Cronbach's alpha coefficients. Respondents were classified into 4 groups by their clothes shopping orientation: conformable/brand conscious purchasing type, planned purchasing/enjoy shopping type, store/brand loyal impulse-oriented type, and dependent/low shopping interest type. There were differences between the missy and the new- silver generations under consideration. It is clear from the study that, even though some individuals of the missy group and of new-silver group belonged to the same shopping orientation type, individuals still showed differences with regard to children's wear purchasing behavior.

• 산업경영시스템학회지
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• 제43권4호
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• pp.208-216
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• 2020

With the spread of smart manufacturing, one of the key topics of the 4th industrial revolution, manufacturing systems are moving beyond automation to smartization using artificial intelligence. In particular, in the existing automatic machining, a number of machining defects and non-processing occur due to tool damage or severe wear, resulting in a decrease in productivity and an increase in quality defect rates. Therefore, it is important to measure and predict tool life. In this paper, ν-ASVR (ν-Asymmetric Support Vector Regression), which considers the asymmetry of ⲉ-tube and the asymmetry of penalties for data out of ⲉ-tube, was proposed and applied to the tool wear prediction problem. In the case of tool wear, if the predicted value of the tool wear amount is smaller than the actual value (under-estimation), product failure may occur due to tool damage or wear. Therefore, it can be said that ν-ASVR is suitable because it is necessary to overestimate. It is shown that even when adjusting the asymmetry of ⲉ-tube and the asymmetry of penalties for data out of ⲉ-tube, the ratio of the number of data belonging to ⲉ-tube can be adjusted with ν. Experiments are performed to compare the accuracy of various kernel functions such as linear, polynomial. RBF (radialbasis function), sigmoid, The best result isthe use of the RBF kernel in all cases

• 한국기계가공학회지
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• 제19권12호
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• pp.34-41
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• 2020

Ready-mixed concrete is unconsolidated concrete typically transported to construction sites by using mixer trucks. A proper rotation of concrete is necessary to prevent its solidification in mixer trucks during transport: in accordance with the manufacturing method and quality inspection prescribed in KSF4009, this movement is maintained after the manufacturing of concrete in professional production plants and the addition of water, solid materials, and admixtures. Unfortunately, mixer truck parts wear out over long periods of time. In order to improve the wear resistance of the main part of mixer trucks, we used a steel plate with good wear resistance or partially added a reinforcement plate. In this study, we first tested the properties of concrete (as required for the DEM), and then carried out mixing and discharge simulations to define the actual operating conditions of mixer trucks. For each condition, we calculated the amount and location of wear. The reliability of our results was finally verified by comparing them with the measurement values. Overall, this study provided basic data for an optimal design of mixer trucks: one that would reduce the vehicles' weight and production costs.

• 한국의류산업학회지
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• 제20권3호
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• pp.304-311
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• 2018

This research used a questionnaire to provide basic data for the design of dressing form that enables the manufacture of senior menswear with an improved fit to match the dissatisfaction with the fit of male suits over the 50s. We used 132 questionnaires as analytical data. The results were: The item 'purchasing method of formal suits' showed that 95.5% purchased ready-to-wear jackets. The 'abdominal obesity type' and 'trunk waist type' had a high frequency of 'complaints about the size of the ready-to-wear jacket'. They choose their suits and wear them directly from the store. It is expected that senior males will complain about ready-to-wear formal suits due to the increase in girth item than normal type due to change of body shape since they consider size to also be important when purchasing suits. The most important part of the body when purchasing suits is the shoulder area, followed by the front width and back width of the fit. As for the degree of recognition of suit size, 38.1% said that they know the size and 'Suit size is hard to understand'. As a result of dissatisfaction with formal dressing, the items of 'Neck wide of get loose', 'Drag line of back neck', 'Not fit of front opening', 'Not fit of shoulder slope' and 'dissatisfaction'. Therefore, it is salient to establish suit fitting system and size system for senior men.

• 복식
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• 제56권4호
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• pp.15-32
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• 2006

The purpose of this study is to research on the actual condition of production and selling in silver apparel market. For the questionnaire, 19 women's wear brands which were in higher ranking of sales in boutiques and madame-zone of department stores were selected. Pattern makers of each brand were questioned about 40 items for this research. The results of the questionnaire were as follows: 1) According to the result of the survey on the made-to-wear production of 19 ready-to-wear manufacturers, there was the gap was in ages between the target and the real consumer. Consumers of these brands were older and aged more broadly than their target ages. 2) Most of the consumers of silver-zone has thick waists, common heights, fat shapes. Custom-made clothes are ordered in many cases because of the big abdomen(50.0%) and H-shape(58.3%) of a somatotype. The body size variation of user population is needed for a good fit. 3) All brands(100%) of this research are using KS standards in the label of clothing, but they don't use these data in their production by reason of unawareness and distrust about these data. These inconsistency between the label and the real size of products may cause a confusion when consumers buy ready-to-wear. 4) Silver apparel manufacturers have need of anthropometry information and dummy(78.6%) suitable for their target consumers to increase their satisfaction about their apparel fit.

• 한국의류학회지
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• 제18권4호
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• pp.549-559
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• 1994

The purpose of this study was to study accumlated residual soils which may be one of the causes for yellowing of worn cloths. Wear and wash tests of white cotton undershirts were repeated at 30 households sellected at random over a period of 60 days. Laundry conditions were similar to home laundry habits in a fact-finding survey, using a powdery heavy duty detergent containing no enzymes or enzymes. The subjects in this study were survey of laundry actual condition, the undershirts from prior to and after the final washing was measured residual soils, $L^*a^*b^*$ value and mellowness index of CIE system. D3ta were analysed by simple correlation analysis of wear and wash cycle, residual soils, whiteness The results obtained were summarized as follows: 1. Using pattern of washing machine, Presoaking was no singinificant differnece in general characteristics of survey respondent. Laundry frequency was significant difference in income level, occupation of housewives whether or not. Use of cold and hot water was significant difference in residence shape. 2. The analyzed consequences of recognition and actual behavior in connection with laundry were found variables each other to have independence or not. 3. Amount of residual sebum soils is using non-enzyme detergent were much more than in using enzyme detergent, increased linearly with increase of the number of wear and wash cycles. 4. Residual protein soils with increase of the number wear and wash cycles less than in laundering more easy than sebum soils. Since accumulated residual sebum soils were much more than residual protein soils. 5. Increase of residual soils was raised mellowness index and diminshed whiteness. yellowness index of residual sebum soils was higher than protein soils. If increase of whiteness will be incresed, amount of residual sebum soils will be decreased sebum soils. Because amount of residual sebum soils much more than protein soils, yellowness index of residual sebum soils was more higher than that of protein soils.

• 대한가정학회지
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• 제26권2호
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• pp.39-47
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• 1988

The aim of this study is to grasp the actual state of high school girls' clothing after liberalization of their uniform and to provide the reasonable guidance materials in clothing for both schools and homes. These are the results of the study 1. In the aspect of the favor of clothing and the interest in about clothes. a. They were fond of wearing "T" shirts, blue jeans in summer and pants and jackets in spring as their school wear. That implies that they enjoy wearing active and practical clothes. b. In the aspect of color, majority of them favored blue or similar colors, Also they had the tendency to love soft, simple clothe and more students preferred cloth without pattern. c. In their choice of them, they seldom paid attention to the informative-label are not their chief interest. d. More than half of girls prepare one or two suits in advance in a season, and they would prepare them deliberately This implies that their everyday life inclothing is based on the economic motive. 2. In the aspect of the purchasing clothes, a. Most of the girls bought them at the market and some of them at the direct-sales stall. b. when they purchased clothes, most girls were accompanied by their/mother and senior girls more often by their friends. c. The price and kinds of their favorite clothes such as "T" shirts and blouse was 5,000 won or so, and skirts, pants, one-piece and jackets are from the range of 5,000 won to below 10,000 won mostly. d. In regard to so-called brand-name items by popular designers, half of the girls responded that they wear some of such kinds of items because of superiority of sewing and longterm wearing, and the other half tend not to wear them due to high price.