• The Journal of the Korea Contents Association
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• v.14 no.12
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• pp.973-988
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• 2014

This study investigated one of the contemporary issues in the Korean capital market and two hypotheses of concern were tested on the financial determinants of profitability for the firms belonging to the Korean chaebols during the era of the post-global financial turmoil. The first hypothesis applying conditional quantile regression (CQR) estimation provided the evidence that leverage ratio, fixed asset utilization, and foreign ownership among the nine quantitative explanatory variables, had overall statistical significance relative to the book-valued profitability measure, while additional variables such as a firm's size, fixed and a proxy for the type of exchange market showed their strong impacts on the market-valued profitability indicator. Concerning the formulated 'extended' DuPont system, only two components of EBITDAEBIT and EMULTIPLIER revealed their prominent influence on ROE (Return on Equity) over the two tested periods (the years 2008 and 2012).

• Korean Journal of Environment and Ecology
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• v.9 no.2
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• pp.232-249
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• 1996

The purpose of this is to suggest objective basic data for the use development and conservation management of the national park through the quantitative analysis of the visual quality included in the physical environment of the Odaesan National Park, for this, spatial images structure of physical elements have been analyzed by factor analysis algorithm and degree of visual quality have been measured mainly by questionnaries. Result of this thesis can be summarized as follows. Factors covering the spatial image of the Odaesan National Park landscape have been found to be the pverall synthetic evaluation, physical, spatial, natural quality and, appeal factors such as the overall the synthetic evaluation, spatial and appeal yield high factor scores. As for the factors determining the degree of visual quality of clear of valley, peculiarity of configuration, natural of trail, harmony of suitable artificaial planting and temple.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.3
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• pp.1707-1710
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• 2014

This paper is the study for the directional solidification of the ingot through the thermal analysis simulation and structural change of casting furnace. The activation analysis of metal impurities were also detected the total number of 10 different metals, but the concentration distribution showed no significant positional deviations in the same position from the top to the bottom. With the results of thermal analysis simulation, the silicon as a whole has reached the melting temperature as the retention time 80 min. The best cooling conditions showed at the upper cooling temperature $1,400^{\circ}C$ and cooling time 60min. The fabricated wafers showed the superior etching result at the grain boundary than that of existing commercial wafers.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.207-208
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• 2003

일반적으로 결정성 고분자에 공정에 있어서 배향 및 결정화 거동은 두 가지 중요한 공정 프로세스로써 고분자의 모폴로지 및 결정구조형성에 매우 큰 영향을 미치며 최종적으로 고분자의 거시적인 물성에 영향을 준다. 고분자 물질의 물리적 특성을 정확하게 이해하여 최적의 물성을 나타내는 내부 구조를 제시하기 위하여서는 고분자 물질의 배양분석에 있어서 분자의 2차원적 배향 상태뿐만 아니라 전체적인 3차원 배향 상태에 관한 정보가 필수적이다. (중략)

• Journal of the Korea Society of Computer and Information
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• v.18 no.9
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• pp.189-199
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• 2013

This study was conducted to identify the effect of a flight attendant's uniform quality on uniform satisfaction and on selecting an airline. To do that, uniform components were first classified into three factors esthetics, functionality, and symbolization. Then the differences of respondents'perception were tested according to the demographics of respondents. Finally the causal relationships among three uniform components, uniform satisfaction and select airline were examined. For the empirical study, the questionnaire data were collected from college and university student studying cabin crew service. The result of this study showed that the perceptions of students who study cabin crew service were significant on according some demographics information, esthetics, functionality and symbolization factors affecting uniform satisfaction, which had the positive effect on selecting an airline. These results suggested practical implications for cabin crew's uniform. These result include important managerial implications for the airlines. Also there was some limitation on a hypothesis of study and the further study were needed.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2008.11a
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• pp.449-450
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• 2008

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.5D
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• pp.453-461
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• 2012

Life analysis is conducted for economic analysis of equipment or facilities. The purpose of life analysis is to predict future indicators for scrapping construction equipment, and establish and utilize a wide variety of business strategies according to data predictions. First, this study shows the methods to figure out average life, life expectancy and life prediction of construction equipment and the analysis of life making methods, using survival curves. Second, the study proposes and examines the life expectancy making model depending on revenues and expenses. The result of the study reveals that the economic life of the same equipment varies with expenses, revenues and the initial cost. The life expectancy making model for construction equipment reflects respective management status for equipment and will help efficient management for companies.

• International Area Studies Review
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• v.17 no.4
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• pp.89-106
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• 2013

In this paper, we analysed the absolute and conditional convergency hypothesis and the determinants of productivity in manufacturing industries from 2000 to 2009 with 16 provinces and metro-cities by using panel analysis. In terms of convergency hypothesis test, the results show that both of the convergency hypothesis, the absolute vs. conditional hypothesis, reject the null hypothesis(H0) implying the labor productivity of the 16 province and metro-cities converged to the steady state equilibrium. Also, the speed of the absolute and conditional convergency for the 16 province and metro-cities are average 4.4% and 0.73% respectively. In addition, the results of the determinants of the labor productivity in manufacturing industry show that human capital and manufacturing location coefficient affect to the value- added per capita significantly, but government expenditure per capita doesn't affect to the value- added per capita. As for the total factor productivity, government expenditure per capita and fixed capital per capita are important factors, but research and development doesn't. Hence the government has to revise the balanced regional development policy to develop regional manufacturing industries for the vulnerable regions. Also, it requires more study regarding income disparities and productivity.

• Journal of Digital Convergence
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• v.12 no.3
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• pp.177-187
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• 2014

We investigate the association between tax strategy and investment efficiency focusing on manager's investment decision. Specifically, we examine the effect of manager's tax avoidance on the firm's investment level. The result show that as the degree of tax avoidance becomes higher firm's over investment increases. This result implies that the available resources generated from firm's tax avoidance induces over investment. Prior researches have been interested in the effects of firm's tax strategy on firm value. However, there is little literatures regarding the effects of firm's tax strategy on management's real investment decisions which provides the important implications about the mechanisms between tax strategy and firm value. In this respect, our research provides a meaningful results which demonstrates the effects of firm's tax strategy on manager's real investment decisions. This will provide useful implications for the investors and government regarding manager's tax avoidance behavior.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.230-230
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• 2010

유기물 반도체 화합물인 Cu-Pc(copper(II)-phthalocyanine)는 우수한 전기적 광학적 특성을 가지며, OLED, MISFET등 소자로서의 활용도가 높다. Cu-Pc 화합물은 $\alpha$-phase, $\beta$-phase, $\gamma$-phase를 포함하는 여러 가지 다결정 polymer로 존재할 수 있다. 가장 잘 알려진 구조로는 열적으로 준안정적인 $\alpha$-phase와 열적으로 안정적인 $\beta$-phase가 있다. Cu-Pc 박막의 구조 및 흡수 특성과 전기적 특성에 대한 기술이 확실히 규명되지 않아 본 연구에서는 두께와 열처리 조건에 따른 결정성 및 방향성을 조사하기 위하여 $\alpha$-phase와 $\beta$-phase의 phase transition 현상 및 전기적 광학적 특성을 규명 하고자 한다. 진공증착 방법 중 하나인 PVD 방법의 thermal evaporation deposition을 이용하여 glass, ITO 기판위에 두께와 열처리에 따른 전기적?광학적 특성을 연구하였다. Cu-Pc 박막의 성장두께는 5nm~50nm 이내로 fluxmeter 및 thickness monitor를 이용하여 제어하였다. 5nm~50nm의 두께에 따른 기판온도를 $200^{\circ}C$로 고정하여 전열 처리 및 후열 처리하여 온도에 따른 박막을 성장한 후, 결정 구조 및 특성 변화와 phase transition 분석하였다. 제작된 Cu-Pc의 박막은 $\alpha$-phase와 $\beta$-phase로 구분할 수 있으며, 열처리에 따른 phase transition 현상이 뚜렷함을 알 수 있다. XRD(X-ray diffraction)를 통하여 박막에 대한 결정 구조 분석 및 FE-SEM(field emission scanning electron microscopy)와 AFM(atomic force microscopy)을 이용하여 Cu-Pc 박막의 구조적 결정성과 방향성 등, 표면 상태와 형상구조에 대해 표면의 특성을 측정하며, 광 흡수도(UV-visible absorption spectra)을 이용하여 phase transition 현상에 따른 I-V 특성을 비교분석 하였다.