• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.1005-1008
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• 1995

The spindle is a very important part of machine tool. The evaluation of spindle motion is required for improving the performance of machine tools. The evaluation tools have been developed for precison spindle by the reversal technique, and 3D error map motion of spindle is proposed. This technique makes us understand the total movement of spindle more easily. The proposed technique has been successfully applied to practical machine tools, giving high potentials for the spindle performance measurement.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.07b
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• pp.1082-1085
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• 2003

본 연구에서는 고분자를 사용하여 만든 유기EL소자인 PLED (Polymer Light Emitting Diode)의 제조공정 변화에 따른 소자성능을 연구하였다. PLED의 제작은 크게 ITO 기판 제작, 발광층 및 전극 증착 등의 공정으로 나누어진다. ITO 기판은 사진식각공정으로, 발광층의 증착은 스핀코팅법으로, 전극은 진공증착법으로 각각 제작하였다. 코팅 시 스핀속도 및 점도 조절을 통하여 발광층의 두께를 조절하였고, 스핀코팅 후 건조방법에 따라서 표면의 uniformity와 발광특성을 비교해 보았다. 실험결과 특정 두께에서 발광특성이 우수하게 나타나는 것을 확인할 수 있었다. 그리고 건조방법에 따라 발광층의 표면 uniformity에 차이가 있었으며, 표면 uniformity에 따라 diode의 I-V 특성 경향이 달리 나타났다.

• Journal of the Korean Magnetics Society
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• v.16 no.1
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• pp.84-87
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• 2006

We suggest a procedure entangling two spin-1/2 particles at distant positions such that they cannot be directly entangled via local interaction. An already entangled pair is used to transfer the entanglement to another pair of particles by way of interaction. This scheme of nonlocal generation of entanglement can be used in the construction of a two-qubit universal gate.

• Journal of Korea Technology Innovation Society
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• v.10 no.4
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• pp.629-653
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• 2007

Korean government drives various programs to improve the performance of university-industry cooperation since 1998 such as BK 21(Brain Korea), NURI(New University for Regional Innovation), Connect Korea Program, and so on. We analyse the relationships between performance of university-industry cooperations and university competency factors(research competency and management competency) through multi-regression model, and propose policy implication. We used the basic data related to the performance of university-industry cooperation and university competency factors from Korean 61 universities. We set up some hypotheses and try to verify them with the method of multi-variable regression analysis including dependent variable(licensing fee, the number of technology transfers, the number of spin-offs) and independent variables(research competency, management competency). We, through this analysis, find both the research competency variables and management competency variables are significant to the performance of university-industry cooperation. Firstly, for licensing fee and the number of technology transfers, research competency variables such as the number of SCIE papers, the number of patent registration were significant, but management competency variables such as the scale of technology leasing organization, the number of specialist were not significant. Secondly, for the number of spin-offs management variables are significant, but research competency varialbles are not. These results imply that both the research competency and management competency of universities are the critical factors for the effective commercialization of university technology not only in United States but also in Korea. In the conclusion, we propose government drive university-industry cooperation policy to enhance the quality of research papers and patent as well as management capabilities of technology leasing organization.