• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.16 no.12S
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• pp.1200-1204
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• 2003

In this study, in order to develop the low temperature sintering ceramics for multi-layer piezoelectric transformer, PSN-PZT system ceramics were manufactured as a function of CuO addition and their dielectric and piezoelectric characteristics were Investigated. CuO addition facilitated densification at low temperature due to the effect of Cu$_2$O-PbO liquid phase. Through the X-ray diffraction pattern study, absence of second phase unwanted was confirmed. Among the specimen to which CuO was added, the 0.6wt% CuO added specimen sintered at 900$^{\circ}C$ and 920$^{\circ}C$ showed the most excellent mechanical quality factor and electromechanical coupling factor, respectively. Besides the densification accelerator, CuO acted as a accepter and increased mechanical quality. Compared with the specimen with no addition sintered at 1150$^{\circ}C$ , the 0.6wt% CuO added specimen sintered at 920$^{\circ}C$ showed the appropriate dielectric and piezoelectric characteristics for multi-layer piezoelectric transformer.

• Fashion & Textile Research Journal
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• v.10 no.3
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• pp.316-321
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• 2008

The purpose of this study is to find what male consumers value in their clothing behaviors, as well as to investigate how the consumers' shopping values and store VM impact on their clothing purchase behaviors. For data collection, research questionnaires were responded by 202 male students living in Busan. The collected data were analyzed according to the frequency-factor analysis using SPSS for win 10.1 Package, the factor analysis using Varimax, reliability analysis, and multi-regression analysis. The results of this study are as follows; First, the shopping values were composed of hedonic, utilitarian, and economic value, and VM was divided into store facility, store image, layout, and fashion information. Second, multi-regression analysis was conducted to find the impact of consumers' shopping values on their clothing purchase behaviors. The result showed that the hedonic shopping value and utilitarian shopping value significantly affected the consumers' clothing purchase behaviors, while economics shopping value did not show any statistical significance. Third, multi-regression analysis was conducted to find the impact of store VM on consumers' clothing purchase behaviors. The result showed that store image, layout, and fashion information had a significant impact on consumers' clothing purchase behaviors.

• Journal of Fashion Business
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• v.17 no.4
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• pp.124-139
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• 2013

Teenage girls under the influence of the physical changes due to the rapid physical development and appearance are interested. 200 parts were used for the statistical analysis of this research against the common excitation high school student positioned in Seoul. First, there was lots of the girl student managing the appearance due to the psychological satisfaction. And the girl student without the friend of the opposite sex managed the appearance at the psychological satisfaction. Because to be more important, thing including the studying, and etc. was the priority the girl student who doesn't the appearance management did not do the appearance management. Second, the factor found out over one month allowance 50,000 circle to be the very important factor through the beauty action high of the high beauty product concern degree and girl student action of the beauty product concern degree and girl student where there is the friend of the opposite sex. Third, the more the concern degree about the beauty product was high as the concern degree about the beauty was high, the girl student in high school could know that beauty action was high as the concern degree about the multi function beauty product was high.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.7
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• pp.1030-1041
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• 2007

The purposes of this study were to identify the sub-dimensions of consumers' attitude and types of loyalty behavior toward fashion brands, and to analyze the influence of consumers' brand attitudes on brand loyalty. A survey was conducted with the questionnaire for consumer's buying experience of fashion brand. A total of 350 questionnaires were distributed, and 341 complete responses were analyzed. Exploratory factor analysis, confirmatory factor analysis, path analysis, and multi-group analysis were used for data analysis. The results of this study were as follows. First, the consumers' brand attitude consisted of four sub-dimensions of affective, familiar, value-expressive, and utilitarian attitude. Second, each brand attitude significantly influenced the brand loyalty behavior(single-brand loyalty, multi-brand loyalty, and brand switching). Finally, the causal relationship between brand attitude and brand loyalty differed by consumer's variety seeking tendency.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.3
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• pp.1367-1371
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• 2013

The RFID market seems to grow mostly in the logistics and distribution areas. The areas and small sized work places requires multi-steps based system. In the environment, the performance of RFID READER is the most important factor. If RFID READER fails to operate frequency well, it will be difficult to apply RFID technology to work places and manage multi-readers used in a narrow place. This work reveals that making possible multiple readers environment and reporting the state of the entire upgrade are of significant in terms of the system's functions. This thesis studied RFID reader platform with self-diagnosis function.

• Korean Journal of Construction Engineering and Management
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• v.9 no.3
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• pp.75-84
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• 2008

Recently, construction industry demands have been changed by domestic construction circumstances such as high-technology, mega-projects, and the complexity of construction. In order to deal with the change of such a domestic construction circumstances, the Ministry of Construction and Transportation (MOCT) has introduced advanced delivery methods. However, the advantages and disadvantages of the advanced delivery methods have not been effectively applied for previous projects. The reason for this is that the "Reviewing Standard for the Large-scale Construction Bidding Method" has not reflected enough prcject characteristics when the delivery method is selected in the project planning phase. Therefore, this paper proposes the Analysis on the Impact Factors of Delivery Method for Multi-Family Housing Projects.

• Geomechanics and Engineering
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• v.21 no.4
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• pp.379-390
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• 2020

The behavior of a piled raft system in multi-layered soil subjected to vertical loading has been studied numerically using 3D finite element analysis. Initially, the 3D finite element model has been validated by analytically simulating the field experiments conducted on vertically loaded instrumented piled raft. Subsequently, a comprehensive parametric study has been conducted to assess the performance of a combined piled raft system in terms of optimum pile spacing and settlement of raft and piles, in multi-layered soil stratum subjected to vertical loading. It has been found that a combined pile raft system can significantly reduce the total settlement as well as the differential settlement of the raft in comparison to the raft alone. Two different arrangements below the piled raft with the same pile numbers show a significant amount of increase of load transfer of piled raft system, which is in line with the load transfer mechanism of a piled raft. A methodology for the factor of safety assessment of a combined pile raft foundation has been presented to improve the performance of piled raft based on its serviceability requirements. The findings of this study could be used as guidelines for achieving economical design for combined piled raft systems.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.21 no.1
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• pp.49-55
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• 2022

Recently, the automobile industry has continued to demand lighter materials owing to international environmental regulations and increased convenience. To address this demand, aluminum parts have increased in popularity and are mainly developed and produced through hot forging and cold pressing. However, because this method has low yield and low production efficiency, a new manufacturing method is desirable. In this study, the water capacity efficiency of an aluminum inner tie rod socket was investigated using cold forging that provided a high yield and excellent production efficiency. Mechanical properties were derived through tensile testing of 6110A aluminum materials, and critical fracture factor and process analysis based on experimental data were carried out. The optimized process was applied as a prototype using cold multi-stage forging, and based on the derived results, the formability, productivity, and material efficiency of aluminum inner tie rod socket parts using this cold forging process was verified.

• Journal of Families and Better Life
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• v.30 no.4
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• pp.37-47
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• 2012

The purpose of this study was to grasp the factors having influence upon the social adjustment of children in multi-cultural families and to examine the degree of influence of these influential factors. For these aims, it targeted 186 children of multi-cultural families, that access social welfare institutions or multi-cultural institutions in the Daegu and Gyeongbuk areas. The findings are as follows. First, the factors having influence upon the social adjustment of children in multi-cultural families were indicated to be self-esteem, parental marital relations, bullying, and the support of adults other than their parents. In other words, these children's higher level of social adjustment was correlated with higher self-esteem, better parental marital relations, fewer bullying experiences from their peer group, and more support from adults other than their parents'. Secondly, support from adults other than parents was indicated to be the most influential among the variables affecting the social adjustment of children in multi-cultural families. The factor having the second highest level of influence was indicated to be self-esteem, followed by parental marital relations, and then bullying.

• Journal of the Korean Society for Precision Engineering
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• v.25 no.4
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• pp.127-133
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• 2008

As the application of the MEMS parts increases, the structural safety of MEMS appears importantly. A lot of MEMS parts are made by a multi-grain silicon wafer, which is an orthotropic material. Moreover directions of the materials on each grain are distributed randomly. The stress analysis for the multi-grain is important factor in order to apply the MEMS parts to industrial applications. The finite element method (FEM) is commonly used by a stress analysis method but the boundary element method (BEM) is known as the result of the BEM is more accurate than that of the FEM since the fundamental solution are used. In this study, we derived the boundary integration equation for the orthotropic material by applying fundamental solutions with complex variables. The multi-region analysis procedure for the BEM and the multi-grain generation procedure by a random process technique are developed in order to apply the analysis of the multi-grain orthotropic material. The discontinuous element is used in order to remove the comer problem in the BEM. The results of the present method are compared with those of the finite element method in order to verify the present procedure.