• Journal of Korea Technology Innovation Society
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• v.13 no.1
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• pp.124-139
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• 2010

This study analyzes determinants of innovation in Korea manufacturing industries from 2005 to 2007. In order to do this, we use raw data from 'Korea Innovation Survey 2008: Manufacturing Sector' conducted by STEPI, and also collect financial statement data from Korea Investors Service. As an analytical method for the empirical test, we utilize Probit model. Empirical results show that firm size and market concentration have positive relationship with firm's innovation activities. These support the ‘Schumpeterian hypothesis’. This would be the most distinguished feature of this study compared to previous literatures.Our study also shows that R&D personnel ratio, R&D intensity, and advertising intensity have positive effects on firms' innovation. Thus, we can say that R&D activities and consumer orientation are the main determinants of innovation. However, profit ratio and growth rate do not have any statistically significant effect on firms' innovation.

• Korean Journal of Human Ecology
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• v.21 no.1
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• pp.15-25
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• 2012

The purpose of this study was to examine the relationship between (1) differences in parents' interest in their children's weight, appearance orientation, eating habits and appearance evaluation, and depression based on children's gender, and (2) the pathway to children's depression. The participants in this research included 641 fourth-grade children (300 boys and 341 girls) who participated in a Korean Survey on Obesity of Youth and Children in 2009. Data were analyzed through frequency, percentage, Pearson's correlations using SPSS 19.0 and path analysis with AMOS 7.0. The findings are as follows. First, girls demonstrated higher scores in all variables except depression when compared to boys. Second, all variables indicated a direct or indirect influence on boys' depression, and appearance orientation had the greatest total effect on boys' depression. For girls, all variables again indicated a direct or indirect influence on depression, and again appearance orientation had the greatest total effect on girls' depression. However, the pathways to depression were different based on children's gender. The implications for future studies are also discussed.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.23 no.2
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• pp.32-39
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• 2015

Airport is not only a public facility but a place where multiple cultural and ethnic groups are visiting. It has been reported though several researches that the level of emotional labor is more heavier than any other job. The more complex our society become, the more frequently emotional labor has been focused. Emotional labor became recently the issue of integrated studies above. Considering the level of emotional labor of airport employees, this paper believes their emotional labor has not been focused compared to such as tourism and service industry. This paper tried to research empirically the impact of internal marketing on airport employees' customer-oriented attitude based on their emotional labor using SEM (Structural Equation Modeling). According to the SEM results, it was proven that 'Autonomy of Airport Employee', a latent variable of internal marketing has a significant negative effect on employees' outside emotion. The outside emotion has also a significant effect on their customer-oriented attitude. It could be concluded the effort to increase decision making authority of employees should be implemented to provide them with deeper customer oriented insight.

• Journal of Satellite, Information and Communications
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• v.8 no.4
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• pp.30-36
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• 2013

Recently the globalization of the media content industry, various activities have been made in the field of art and the speaker system is very important in the sound industry which is one of the arts. The directional characteristics of a loudspeaker refer to the radiation of sound in certain directions and are among the most important features of a loudspeaker. Designing a loudspeaker that can keep all of its constant directivity at all frequencies is difficult due to the wavelengths of audio frequencies and the size of horns and transducers. This study proposed gradient array methods to improve low frequency pattern control of full-range speakers to maximize Direct to Reverberant Ratios at the listeners.

• Journal of Advanced Navigation Technology
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• v.20 no.5
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• pp.394-400
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• 2016

It is well known that the encrypted ranging signal, such as GPS P(Y) code, is immune to spoofing attack. However, in order for users to use the signal, there needs permission from the operator. And also there are many restrictions for use because of security issues. In this paper, a ground reference station equipped with high-gain directional antenna and a user receiver were simulated. In the reference station, the encrypted code can be demodulated from the high-gain signal. And then the code can be used to detect spoofing attack in the user receiver. This paper proposes the spoofing detection method using the encrypted signal and deals with simulation results.

• Journal of Broadcast Engineering
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• v.14 no.1
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• pp.89-92
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• 2009

In this paper, we discuss the BBA based power scaling scheme in cognitive radio technique for WPAN system. We focus on Cognitive Radio environment which is currently ongoing standard procedure and is able to focus on future communication and show the transmitted power scaling of CR user. We suggest the available communication method of CR user, while it is simultaneously satisfying both minimum interference of PU(Primary User) and possible communication of CR user. The method is using the BBA, and we show several merits in face of received SINR. and we prove that CR vary its transmit power while maintaining a guarantee of service to primary users.

• Journal of the Korean Institute of Telematics and Electronics
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• v.9 no.2
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• pp.17-23
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• 1972

In this paper, the radiation characteristics of a large circular loop antenna with sinusoidal current distribution is studded in a moving media with a constant velocity much less than the speed of light. The diameter of the circular loop antenna is comparable with or larger than wave length. In studing the radiation characteristics, vector potential for the antenna is derived and relative field pattern is plotted from the vector potentials. Finally the field patterns are compared with those of stationary media. It is found that maximum directivities are shifted to the direction of the velocity of the media, and the field intensities are decreased in that direction and increased in opposite direction by the velocity component paralell to the loop plane. It is also found that the deviations for the pattern are proportional to the velocity of the media, the frequency of the distributed current, the diameter of the loop antenna, and the daviation depends only upon the parallel component of the velocity to the loop plane.

• Korean Journal of Childcare and Education
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• v.14 no.3
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• pp.77-95
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• 2018

Objective: The purpose of this study was to examine the mediating role of school adjustment in the relationship between adolescents' mastery goal orientation and life satisfaction, and the differences according to gender in the relationship. Methods: The participants were 1,947 students from the 3rd, 4th, and 5th waves of the Korean Child Youth Panel Study(KCYPS). The data were analyzed with structural equation modeling(SEM) and multiple group analysis. Results: First, school adjustment of 1st graders in middle school mediated the relation between mastery goal orientation of 6th graders in elementary school and life satisfaction of 2nd graders in middle school. Second, the differences in gender were confirmed. The effect of mastery goal orientation of 6th graders in elementary school on school adjustment of 1st graders in middle school is higher for boys. In contrast, the effect of school adjustment of 1st graders in middle school on life satisfaction of 2nd graders in middle school is higher for girls. Conclusion/Implications: The results of this study suggested that mastery goal orientation before entering middle school and school adjustment after entering middle school could be important variables to increase adolescents' life satisfaction. Also, it is necessary to consider gender difference for long-term intervention for improving adolescent life satisfaction.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.237-243
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• 2014

In this paper, we propose a mobile image retrieval system which utilizes the mobile device's sensor information and enables running in a variety of the environments, and implement the system on Android platform. The proposed system deals with a new image descriptor using combination of the visual feature with EXIF attributes in the target of JPEG image, and image matching algorithm which is optimized to the mobile environments. Experiments are performed on the Android platform, and the experimental results revealed that the proposed algorithm exhibits a significant improved results with large image database.

• Culinary science and hospitality research
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• v.23 no.8
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• pp.67-82
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• 2017

The recent increase in the percentage of services industries has dominated in the entire industry. Emotional feeling of service workers is consequently indispensable in service industries in order to facilitate the progression of the service delivery process. In most circumstances, the emotional labor of service in service industries has been increasingly recognized. Although many studies related to emotional labor have been conducted, a precedent study will be needed to find positive factors such as customer orientation and business performance of restaurant employees accompanying emotional labor. This study attempted to practical meaning to food service companies by inquiring into such as positive effects of employee's emotional labor on the customer orientation and business performance. For this purpose, this study established hypotheses and deduced results using literature research and empirical analyses, and found implications to the service companies. The results of this study showed that the higher the emotional labor of the restaurant employees gets, the lower customer-orientation becomes, and the higher the customer-orientation of restaurant employees gets, the higher the performance of the company becomes.