• Environmental and Resource Economics Review
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• v.17 no.2
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• pp.255-286
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• 2008

In this paper, it is tried to combine the decomposition method and econometric analysis for the extension of the decomposition method. Since two approaches approach the energy efficiency problem in the different perspectives, it is believed that it is hard to reconcile the results of two approaches. In the results of energy intensity effect analysis with the econometric method, it is found that the increase in the energy price results in the improvement of energy intensity effect. In enconometric analysis of energy efficiency, the coefficient of a time trend measured as a proxy of energy efficiency is significant and has a negative effect on the energy consumption. This finding implies the energy efficiency improves very slowly over time. In addition, the directions of energy efficiency improvement in the decomposition method are consistent with those in the econometric analysis in four industries. This finding indicates that two methods may be in complementary cooperation for the analysis of energy efficiency. Therefore, it is needed the efforts to seek the complementarity between two methods for the enhancement of academic and policy implications.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.1178-1182
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• 1993

Variable-displacement pumps are inherently more efficeint than fixed-displacement pumps under varying loads. Their energy-saving characteristics can be improved by the use of special control. This paper shows the improvement of the system by the use of load-sesing technique.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.862-866
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• 2005

This paper presents a suggestion for improvement of droppers. To prevent circulation currents in trolly wire system, we developed a new type of elastic droppers and validated/verified its function. In this paper, therefore, we introduced a developed elastic dropper and analyzed economical efficiency of it.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.688-693
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• 2005

This paper presents a suggestion for improvement of cantilever. We developed a new type of cantilever and validated/verified its function. In this paper, therefore, we introduced a developed cantilever and analyzed economical efficiency of it.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.971-972
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• 2012

• Journal of Electrical Engineering and Technology
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• v.11 no.5
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• pp.1274-1281
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• 2016

• Proceedings of the Korean Geotechical Society Conference
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• 1998.10a
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• pp.381-388
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• 1998

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.179-180
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• 2013

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
• /
• pp.567-568
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• 2013

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.17 no.12
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• pp.1341-1346
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• 2004

The OLED research is gone for two directions. One is material development research, and another one is structural improvement part. All two are thing to heighten luminescence efficiency of OLED. n other to improve luminescence efficiency of OLED Electron - hole pairs must consist much more in the device Their profiles are sensitive to mobility velocity of electrons and holes. In this paper, we demonstrate the difference of velocity between hole and electron by experiments, and compare with a data of simulation and experiment changing hole carrier transport layer thickness, so we get the optimal we improve luminescence efficiency. We suggest improving the efficiency of OLEDS would be to balance the injection of electrons and holes into light emission layer of the device. And, we improve understanding of the various luminescence efficiency through experiments and numerical analysis of luminescence efficiency in variable hole carrier transport layer's thickness.