• 복식문화연구
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• 제31권5호
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• pp.607-626
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• 2023

This study analyzes consumer fashion purchase patterns from a big data perspective. Transaction data from 1 million transactions at two Korean fashion brands were collected. To analyze the data, R, Python, the SPADE algorithm, and network analysis were used. Various consumer purchase patterns, including overall purchase patterns, seasonal purchase patterns, and age-specific purchase patterns, were analyzed. Overall pattern analysis found that a continuous purchase pattern was formed around the brands' popular items such as t-shirts and blouses. Network analysis also showed that t-shirts and blouses were highly centralized items. This suggests that there are items that make consumers loyal to a brand rather than the cachet of the brand name itself. These results help us better understand the process of brand equity construction. Additionally, buying patterns varied by season, and more items were purchased in a single shopping trip during the spring season compared to other seasons. Consumer age also affected purchase patterns; findings showed an increase in purchasing the same item repeatedly as age increased. This likely reflects the difference in purchasing power according to age, and it suggests that the decision-making process for pur- chasing products simplifies as age increases. These findings offer insight for fashion companies' establishment of item-specific marketing strategies.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2001년도 추계학술대회 논문집
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• pp.122-127
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• 2001

As pipelines are often used to transport gas, oil, water and oil products, there are more than one pipeline installed in the offshore field. The size and space of pipelines are various depending on the design specifications. The pipelines are to be designed and installed to secure the stability to external loads during the installation and operation period. The flow patterns are very complex around the pipelines being dependent on incoming flow velocity, pipelines size and space. To investigate the flow patterns, number of experiment are conducted with visualization equipment in a circulating water channel. The flow motion and trajectory were recorded from the laser reflected particles by camera. From the experiment the flow patterns around spaced pipelines were obtained. Also pressure gradient was measured by mano-meter to estimate the hydrodynamic forces on the behind pipeline. The results show that the various sizes and spaces can be affected in the estimation of external load. The complex flow patterns and pressure gradients can be effectively used in the understanding of flow motion and pressure gradient.

• Journal of Multimedia Information System
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• 제5권3호
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• pp.195-200
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• 2018

Recently, as the sensor and big data analysis technology have been developed, there have been a lot of researches that analyze the purchase-related data such as the trajectory information and the stay time. Such purchase-related data is usefully used for the purchase pattern prediction and the purchase time prediction. Because it is difficult to find periodic patterns in large-scale human data, it is necessary to look at actual data sets, find various feature patterns, and then apply a machine learning algorithm appropriate to the pattern and purpose. Although existing papers have been used to analyze data using various machine learning methods, there is a lack of statistical analysis such as finding feature patterns before applying the machine learning algorithm. Therefore, we analyze the purchasing data of Songjeong Maeil Market, which is a data gathering place, and finds some characteristic patterns through statistical data analysis. Based on the results of 1, we derive meaningful conclusions by applying the machine learning algorithm and present future research directions. Through the data analysis, it was confirmed that the number of visits was different according to the regional characteristics around Songjeong Maeil Market, and the distribution of time spent by consumers could be grasped.

• 한국의류산업학회지
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• 제8권2호
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• pp.161-167
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• 2006

The purpose of this research are to identify the nature of artistic beauty of Kokuryeo dresses and to apply the artistic beauty, formative uniqueness, and esthetic value of Kokuryeo in the modern Korean dress design for creation of new designs. Significance of this research lies in the fact that beauty of traditional dresses possesses highly valuable importance for application to modern fashion design processes. Kokuryeo dresses basically comprised of Yu, Sang, Go and Po, and contains within abstract beauty along with emphasis on geometric elements like dots, lines, and surfaces. Red, Black, Violet, Verdant and scarlet colors were moderately used against the mainly white canvas, and different colors were often used for the top and the bottom. Silk, Hemp cloth and Wool were used for different social levels or ranks, and from the wide variety of colors and patterns of the dresses, such as Round-patterns, Cloud-patterns and Vine-patterns, worn by the people illustrated on the wall paintings, it appears that various materials were used. Vertical hems, Yu (shirts), Sang (skirts), noblemen's dresses, kings' dresses, etc. from Kokuryeo tomb wall paintings were applied, and various dying methods, natural materials and sewing methods were used to recreate the unique features of Kokuryeo dresses in modern designs in an attempt to recreate the esthetic value of Kokuryeo dresses.

• 한국가시화정보학회지
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• 제17권3호
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• pp.52-58
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• 2019

Thermal performance and flow patterns inside the closed loop pulsating heat pipe (CLPHP) were experimentally investigated. For investigating the effect of working fluids, CLPHP was filled with various working fluids including methanol, acetone and ethanol. The thermal resistance was calculated by temperatures in evaporator and condenser and flow patterns were visualized by a digital camera. The thermal resistances for all fluids were decreased as the heat increases. Flow patterns change from static slug to elongated slug flows, bulk circulation and annular flows as the heat increases. Dry-out occurs after annular flows. For reasonable comparison of thermal performances, normalized CHF, Kutateladze number (K_u), was compared. Even though ethanol has smallest CHF, K_u of ethanol is similar with that of methanol. In addition, acetone has the highest K_u that means CLPHP with acetone provides the higher thermal performance compared with CLPHP with other fluids.

• 패션비즈니스
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• 제17권6호
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• pp.158-175
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• 2013

The purpose of this study is to provide basic information to Korean fashion designers who wish to advance to the overseas collection. This is done through analyzing the design characteristics of Japanese young fashion designers, Tsumori Chisato, Commuun, and Limi Feu, who have successfully launched their designs into the Paris collection and became global fashion brands. Collections of each brand were analyzed by the overall fashion style and design elements. For the overall fashion style, Tsumori Chisato used a romantic style using details with various ornaments, whereas Commuun shows minimal style with a simple silhouette. Limi Feu expressed avant-garde style with experimental patterns. Moreover, these brands expressed different style to other brands by applying Japanese traditional clothes, patterns, and Japanese techniques in modern view point. In terms of design elements, these three brands used the H-line silhouette. Tsumori Chisato used loose fit; Commuun, slim line; and Limi Feu, boxy silhouette. In the case of colors, materials, patterns and details, Tsumori Chisato showed mix & match with various colors, materials, patterns and details. Commuun used mono tone with black & white using only one or two materials. Limi Feu usually used the color black with cotton. According to the style of the brand and region of the collection, the main characteristics of the design and the application of Japanese traditional elements can be different.

• 한국동물학회지
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• 제24권1호
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• pp.27-37
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• 1981

노랑초파리 (Drosophila melanogaster) 난자형성단계에 따른 난소와, 수정 후 발생에 EK른 발생배, 유충 그리고 번데기의 단백질양상을 polyacrylamide gel 전기영동법으로 조사하였다. 초파리 난자형성단계에 따른 난소의 단백질양상과, 수정 후 발생단계에 따른 단백질양상은 각 단계가 진행됨에 따라 전기영동상에서 band의 차이로 나타나는 질적인 면과 상대적인 양에 있어서 다양한 변화를 보여 주었다. 특히 난자형성 초기단계에서는 3개로 나타났던 난황단백질이 후기에는 한 개의 단백질로 전환해가는 현상을 나타내었다. 그리고 번데기시기까지의 단백질양상은 알의 시기에서 유충시기로의 전환점과 2령기에서 3령기로 전환되는 점에서 큰 변화를 보여 주었다.

• 대한안전경영과학회지
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• 제12권4호
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• pp.255-263
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• 2010

The research developes short-run standardized control charts(SSCC) and short-run acceptance control charts(SACC) under the various demand patterns. The demand patterns considered in this paper are three types such as high-variety and repetitive low-volume pattern, extremely-high-variety and nonrepetitive low-volume pattern, and high-variety and extremely-low-volume pattern. The short-run standardized control charts developed by extending the long-run ${\bar{x}}$-R, ${\bar{x}}$-s and I-MR charts have strengths for practioners to understand and use easily. Moreover, the short-range acceptance control charts developed in the study can be efficiently used through combining the functions of the inspection and control chart. The weighting schemes such as Shewhart, moving average (MA) and exponentially weighted moving average (EWMA) can be considered by the reliability of data sets. The two types according to the use of control chart are presented in the short-range standardized charts and acceptance control charts. Finally, process capability index(PCI) and process performance index(PPI) classified by the demand patterns are presented.

• Tribology and Lubricants
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• 제37권1호
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• pp.1-6
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• 2021

This paper presents the experimental results of hydrophobic surfaces developed using a stereolithography-based additive-manufacturing technique. The additive manufacturing technique can be used to manufacture objects with complex geometries from computer-aided design data. Several additive manufacturing methods, such as selective laser sintering, fused deposition modeling, stereolithography apparatus (SLA), and inkjet-based system, have been developed. The SLA is a form of three-dimensional printing technology used to create prototypes, patterns, and production parts in successive layers through photochemical processes. Light causes chemical monomers and oligomers to cross-link together to form objects composed of polymers. Moreover, this method is economical for fabricating surfaces with high output resolution and quality. Here, we fabricate various surfaces using different shapes using an SLA. The surfaces with micro-patterns are fabricated for 10 cases, including the biomimetic surface. The fabricated surfaces with various micro-patterns are evaluated for hydrophobicity performance based on the static contact angle. The contact angle is measured three times for each case, and the averaged value is used. The results indicate that the arrangements in a staggered structure have a larger contact angle than those in a line when the same micro-pattern is applied. Moreover, the mimetic surfaces exhibit more hydrophobic characteristics than those of artificial micro-patterns.

• Advances in nano research
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• 제16권1호
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• pp.11-26
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• 2024

In this study, free vibration analysis of FG porous spherical cap reinforced by graphene platelets resting on Winkler-type elastic foundation has been surveyed for the first time. Three different types of porosity patterns are considered for the spherical cap whose two types of porosity patterns in the metal matrix are symmetric and the other one is uniform. Besides, five GPL patterns are assumed for dispersing of GPLs in the metal matrix. Tsai-Halpin and extended rule of the mixture are used to determine the Young modulus and mass density of the shell, respectively. Employing 3D FEM elasticity in conjunction with Hamilton's Principle, the governing motion equations of the structure are obtained and solved. The impact of various parameters including porosity coefficient, various porosity distributions in conjunction with different GPL patterns, the weight fraction of graphene Nano fillers, polar angles and stiffness coefficient of elastic foundation on natural frequencies of FG porous spherical cap reinforced by GPLs have been reported for the first time.