• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.312-315
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• 2002

This paper summarizes the results of a numerical study conducted to analyze the effect of selected process parameters on material flow and thread profile in thread rolling of large diameter blanks. Based on the previous work where a plane strain mode was found to provide a reasonable approximation of the thread rolling process, the effect of varying thread form, friction factor, flow stress, and blank diameter on effective strain and thread height was analyzed using the finite element code DEFORM. This study show that effective strain for flank angle, that blank diameter had important effect on the as-rolled thread while flow stress, friction factor, and crest round of dies had significant impact on effective strain at the thread root and crest and load of thread rolling. While the rate of strain harding was found to have an effect on the crest profile, the results indicate that it is the primary factor responsible for seam formation in rolled threads.

• Culinary science and hospitality research
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• v.23 no.4
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• pp.144-162
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• 2017

This research utilized integrated package program of PASW Statistics 18.0 and AMOS 22.0 to analyze how the influence of service quality factor of coffee chains affects customer satisfaction and intention of customer behavior. The utilized statistics techniques were frequency analysis, exploratory, confirmatory factor analysis, covariance structure analysis, multiple group structure equation model analysis, etc. As a result of hypothesis verification, first of all, it was verified that the service quality factor of coffee chains affected positive (+) effect on service justice. Second, it was verified that the service justice affected positive (+) effect on customer satisfaction. To see it detailed, it is possible to see that all factors, perception of interactive justice, distributive justice, procedural justice, were adopted as the case of affecting service satisfaction (p<.001). Third, it was verified that among the circumstances that service quality affected to satisfaction, justice played a role as intermediary role. Fourth, it was verified that service satisfaction affected positive (+) effect on customer satisfaction, finally, the influence that customer satisfaction affecting behavioral intention has no effect on behavioral intention by brands of domestic or abroad.

• The Bulletin of The Korean Astronomical Society
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• v.41 no.1
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• pp.79.3-80
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• 2016

We have investigated the correlation analysis between global temperature anomaly and two main factors: geomagnetic activity (aa index) of Earth external factor and CO2 of Earth internal factor. For this, we used NOAA Global Surface Temperature anomaly (Ta) data from 1868 to 2015. The aa index indicates the geomagnetic activity measured at two anti-podal subauroral stations (Canberra Australia and Hartland England) and the CO2 data come from historical ice core records and NOAA/ESRL data. From the comparison between (Ta) and aa index, we found several interesting things, First, the linear correlation coefficient between two parameters increases until 1985 and then decreases rapidly. Second, the scattered plot between two parameters shows a boundary of the correlation tendency (positive and negative correlation) near 1985. A partial correlation of (Ta) and two main factors (aa index, CO2) also shows that the geomagnetic effect (aa index) is dominant until about 1985 and the CO2 effect becomes much more important after then. These results indicate that the CO2 effect become very an important factor since at least 1985. For a further analysis, we simply assume that Ta = Ta(aa)+Ta(CO2) and made a linear regression between (Ta) and aa index from 1868 to 2015. A linear model is then made from the linear regression between energy consumption (a proxy of CO2 effect) and Ta-Ta(aa) since 1985. Our results will be discussed in view of the prediction of global warming.

• Journal of the Korea Safety Management & Science
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• v.20 no.3
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• pp.1-9
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• 2018

This study is intended to look into the effect of construction safety supervision system on risk control and reduction. To achieve this, a survey was carried out to 114 companies in construction, ordering, contract and management. The overall findings were as follows. The effect of construction safety supervision system on risk control and reduction showed that factors of supervision system, supervision cost and supervision method had a positive effect on risk control and reduction. And their perception of the introduction of safety supervision system in construction sites according to process showed that there was a difference between them according to the field of ordering, contract and supervision. There was the biggest difference between owner and contractor in double supervision system, but no difference between them in the perception of risk reduction. These results show that all ordering, contract and supervision are positively needed for the introduction of construction safety supervision. This means that there is a difference between owner and contractor in the perception of process according to system operation. All companies agree to system improvement by the settlement of safety supervision system for the prevention of safety accidents and safe construction, but the systematic complement of safety supervision is the burden of contractor. And there is a big difference between owner and contractor in the perception of responsibility and concern for cost burden.

• Journal of the Korean Society for Precision Engineering
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• v.25 no.1
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• pp.99-107
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• 2008

There are being a lot of studies for achievement of high speed Dehydration, high-strength and Lightweight of washing machine in the latest washing machine business. It is essential that strength of mechanical press-Joining (MPJ) for spin drum is improved to attain that target. MPJ of spin drum is composed of seaming and caulking process. Because Seaming process of MPJ has various design factors such as thickness, bending radius, seaming width, caulking press width and the dynamic factor such as multistage plastic working, elastic recovery, residual stress, the optimum conditions can't be easily determined. Using a design of experiment (DOE) based on the FEM (Finite Element Method), which has several advantages such as less computing, high accuracy performance and usefulness, this study was performed investigating the interaction effect between the various design factor as well as the main effect of the each design factor during drum MPJ and proposed optimum condition using center composition method among response surface derived from regression equation of simulation-based DOE.

• Journal of the Korea Fashion and Costume Design Association
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• v.16 no.2
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• pp.163-175
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• 2014

The purpose of this study was to investigate the effect of self-efficacy and appearance interest on appearance management and clothing purchase behavior of new silver generation. The research method was a survey method using a questionnaire. The subjects were 300 new silver woman(aged from 50 to 64) living in the large city. Statistical analysis methods were factor analysis, Cronbach's ${\alpha}$ and multiple regression analysis. The results of this study were as follows. The self-efficacy factor divided into three categories including self-control efficacy, social self-efficacy and physical self-efficacy. And appearance interests were divided into four categories including weight control interest, outfit management interest, interest in clothing and disinterest in appearance. Self-efficacy had significant effect on various appearance interests. Especially physical self-efficacy was the important factor which could describe the appearance interests more effectively. Self-efficacy and appearance interests had significant effect on appearance management and clothing purchase behavior. Social self-efficacy could describe more appearance management behavior, while on the other side self-control efficacy could describe the clothing purchase behavior more effectively.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.3
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• pp.1163-1169
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• 2021

This study aims to obtain empirical evidence regarding the effect of the fraud pentagon theory on financial statement fraud. The novelty of this study is the use of factor analysis to consolidate the five elements of the fraud pentagon into just one factor, which, to the knowledge of the researcher, no one else has done to research the effect of pentagon fraud on financial statement fraud. This study uses both agency theory and fraud pentagon theory. The population of this study consists of state-owned companies listed on the Indonesia Stock Exchange. The research period in this study is from 2014 to 2019. The data used in this study is secondary data obtained from the company's annual financial statements. A purposive sampling technique was used to determine the research sample. The selected companies total 20. Factor analysis and simple linear regression analysis method were used as research the methods. Based on the research results, it was found that the fraud pentagon theory had a positive effect on the financial statement fraud of state-owned companies listed on the Indonesia Stock Exchange. High level of the pentagon fraud on a company leads to a higher indication of financial statement fraud.

• The Journal of Information Systems
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• v.32 no.3
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• pp.225-251
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• 2023

Purpose The purpose of this study is to examine the future direction of in-vehicle app development and service, the relationship between potential customers' intention to use and the factors that affect it was explored. It was also checked whether the two types of app development platform and the experience of the existing smartphone app platform had a moderating effect on these relationships. Design/methodology/approach Data was gathered through surveys, collecting responses from 904 potential consumers of vehicle app services in Korea. Structural equation modeling was utilized to analyze the data. Findings According to the empirical analysis result, it was found that potential customers considered enjoyment as the most important benefit factor in in-vehicle app service, and the most important external factor affecting enjoyment was functional compatibility with smartphone. The type of vehicle app development platform did not have a meaningful moderating effect on the factor relationship, whereas the smartphone app platform experience showed a meaningful moderating effect on the relationship between factors. It was analyzed that the risk of app performance, personal information privacy, and driving safety data did not have a negative effect on the intention to use the vehicle app service.

• Journal of Industrial Convergence
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• v.20 no.10
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• pp.147-156
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• 2022

The purpose of this paper was to verify the mediated effect of grit in the relationship with the effect of youth social support on aggression. To this end, data from the 2018 Children and Youth Panel (KCYPS) survey were used, and 2,590 first-year middle school students were selected and analyzed. As for the analysis method, Baron & Kenny's regression analysis and Sobel Test were performed. As a result of the main analysis, first, it was found that grit had a partial mediating effect in the effect of parental support, a sub-factor of social support of adolescents, on aggression. Second, it was found that grit had a partial mediating effect in the effect of friend support, a sub-factor of social support of adolescents, on aggression. Third, it was found that grit had a partial mediating effect in the effect of teacher support, a sub-factor of social support of adolescents, on aggression. Based on the above research results, various program development and policy alternatives that can reduce youth aggression and improve grit were suggested.

• Fashion & Textile Research Journal
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• v.24 no.6
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• pp.789-800
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• 2022

This study investigates the effect of recovery elasticity of beauty college students on university life adaptation during COVID-19. Further, the mediating effect of grit in relation to recovery elasticity and university life adaptation is analyzed. Survey data of 223 students (female: 192; male: 31) were collected for multiple and intermediate regression analyses using SPSS 24.0. The results reveal a static correlation between the lower factors of resilience, glittery, and adaptation to college life and that the resilience of junior college students in the beauty department had a static effect on grit and their adaptation to college life. Passion, a subordinate factor of grit, is mediated by the effect of grit on the relationship between resilience and adaptation to university life. However, perseverance, another subordinate factor of grit, did not have any such mediating effect. These results confirm the importance of grit, particularly passion, for resilience and adaptation to college life. It was confirmed that resilience was due to college life adaptation of beauty department students, and it was confirmed that passion, a sub-factor of grit, also had a mediating effect. Therefore, it is judged that resilience induces physical and mental adaptation, interpersonal adaptation, and academic adaptation necessary for college life, and works in many ways to improve the quality of life of beauty department junior college students. Instructors should consider developing educational programs for improving recovery elasticity and grit to help students better adapt to university life.