• Journal of the Korean Wood Science and Technology
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• v.11 no.3
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• pp.49-57
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• 1983

This study dealts with the penetration of methyl methacrylate(MMA) monomer-solvent system into five Korean major tree species, especially the Pinus koraiensis S. et Z., Pinus densiflora S. et Z., Larix leptoiepis Gordon, Quercus serrata Thunb. and Betula platyphylla var japonica Hara. In this report I described the results of the interaction between wood and polymer loading by catalyst-heat polymerization. On the other hand the influence of penetration of polymer loading on dimensional stabilization on WPC of Pinus koraiensis by catalyst-heat polymerization was also investigated.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.26 no.9
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• pp.1234-1240
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• 2002

A new feedback control law is proposed and tested for suppressing the vortex shedding from a circular cylinder in a uniform flow. The lift coefficient ( $C_{L}$) is employed as a feedback control signal and the control forcing is given by a rotational oscillation of the cylinder. The influence of the feedback transfer function on the $C_{L}$ reduction is examined. The main rationale of the feedback control is that a feedback control forcing is imposed at a phase which is located outside the range of lock-on. By applying the feedback control law, $C_{L}$ is reduced significantly. Furthermore, the reduction mechanism of $C_{L}$ is analyzed by showing the vortex formation modes with respect to the forcing phase.e.ase.e.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.61-64
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• 2009

본 연구는 OpenGL을 이용하여 3차원 그래픽으로 가상캠퍼스 맵을 구현한다. 매핑 효과, 블랜딩 이론등을 적용하여 사실적인 물체를 구현하는 것을 목표로 한다. 매핑 효과는 조금 더 사실적인 캠퍼스 모습을 보여준다. 그리고 가상캠퍼스에 사용될 지형지물은 그래픽 기법과 블랜딩 이론을 적용하여 구현함으로써 구조를 보여준다. 본 논문은 데이터의 용량과 랜더링 시간을 줄이고, 전체적인 향상을 위한 알고리즘을 개발하는데 중점을 둔다.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1997.04a
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• pp.102-106
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• 1997

Grinding has difficulty in satisfying the qualitative knowledge based on the skilled expert as well as quantitative data for all user. Design of grinding database is based on the frame-based model for utilizing the empirical and qualitative knowledge. Inthis paper, basic strategy to develop the grinding database by frame-based model, which is strongly dependent upon experience and intuition, frame-base model, which is strongly dependent upon experience and intuition, is described. Design of grinding database is based on the frame-based model for utilizing the ambiguous knowledge and inference is accomplised by the object-oriented paradigm system.

• Korean Journal of Microbiology
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• v.31 no.2
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• pp.136-140
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• 1993

The A. nidulans expression vector which contained trpC marker gene from A. nidulans was constructed to produce glucoamy]ase. The recombinant plasmid was introduced into auxotrophic mutant A. nidulans B17. Southern blot analysis of the genomic DNA from transformant showed that pKHG2 DNA had integrated into the A. nidulans chromosomes. Northern analysis of the total RNA from transform ant showed that mRNA of glucoamylase gene was synthesized in induction condition. Specific activity of glucoamylase was increased in transform ants. G]ucoamylase was shown to be active in non-denaturing acrylamide gel.

• KSBB Journal
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• v.11 no.4
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• pp.489-496
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• 1996

Metal dispersed carbon paste electrodes were fabricated, and their electrochemical properties were investigated. Among various metal dispersed carbons, platinum-dispersed carbon paste electrode showed most efficient electrocatalytic characteristics. The overpotential for the oxidation of NADH was significantly lowered in the platinum-dispersed carbon paste electrode, and catalytic current was also enhanced. Based on these electrocatalytic observations, L-lactate biosensor using L-lactate dehydrogenase was constructed to evaluate its performance in terms of sensitivity and stability.

• Journal of Institute of Control, Robotics and Systems
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• v.10 no.4
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• pp.371-376
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• 2004

Distributed Network Protocol Version 3.0 (DNP3.0) is the communication protocol developed for the interoperability between a RTU and a central control station of SCADA in the power utility industry. In this paper DNP3.0 is implemented by using HDL with FPGA and C program on Hitachi H8/532 processor. DNP3.0 is implemented from physical layer to network layer in hardware level to reduce the computing load on a CPU. Finally, the ASIC for DNP3.0 has been manufactured from Hynix Semiconductor. The commercial feasibility of the hardware through the communication test with ASE2000 and DNP Master Simulator is performed. The developed protocol becomes one of IP, and can be used to implement SoC for the terminal device in SCADA systems. Also, the result can be applicable to various industrial controllers because it is implemented in HDL.

• Food Science of Animal Resources
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• v.20 no.4
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• pp.282-287
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• 2000

동결기간과 해동 후 재냉장이 우육의 기호성에 미치는 영향을 검토하기 위하여 도축 후 1일 냉장한 홀 스타인 등심육을- 2$0^{\circ}C$에 동결하여 20, 40 및 60일째에 해동하는것과 이것을 1$^{\circ}C$에 재냉장한 것의 전단력가, 부수성, 액토미 오신의 추출성과 ATPase 활성에 대한 실험과 함께 관능평가를 실시하였다. 우육의 전단력가능 동결 중 변화가 없었으며 해동 후 재냉장에 의하여 낮아졌다. 부수성은 동결기간이 길수록 낮아지고 재냉장에 의한 유의적인 차이를 보이지 않았다. 액토미오산의 추출성과 Ma-ATP-ase 활성은 동결기간이 길수록 낮아지고 재냉장에 의하여 높아지고 경향을 보였다. 재냉장에 의한 기홍성 향상 효과는 동결기간이 짧을수록 크게 나타났다. 재냉장에 의하여 기호성이 우수하게 된 것은 조직감과 가열육향의 향상이 크게 관련되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.205-208
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• 2005

3D 모델링 시스템이 최근에 여러 분야에 많이 이용되면서, 3D 인체 모델링 또한 사용가치가 높아지고 있다. 그러나 그에 따른 많은 시간과 노력이 필요하다는 것을 알 수 있다. 본 논문에서는 3D 인체 모델을 전문가가 아닌 일반 사용자들도 쉽게 구현할 수 있도록 빠르고 사실적인 시스템을 개발하였다. 이러한 3D 인체 모델링을 위하여, 기존의 연구들과 달리 Ase파일 포맷을 통하여 인체 모델을 생성하고 조금 더 정확하고 자연스럽게 모델링 할 수 있도록 계층형 구조의 모듈 개발을 시도하여 사실적인 3D 인체 모델링이 될 수 있도록 하였다.

• Journal of Distribution Science
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• v.10 no.7
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• pp.13-22
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• 2012

The effect of the September 2008 global financial crisis weighed heavily on stock markets around the world. The purpose of this study is to empirically investigate the impact of the crisis on Amman Stock Exchange. Event study methodology has been adopted on a period of 24 months, from January 2008 to December 2009. Monthly average abnormal returns across a sample of 52 industrial and services companies have been tested separately. The results reveal that Amman Stock Exchange experienced significant negative abnormal returns in the fourth quarter of the year 2008. However, there were no significant abnormal returns observed thereafter. This means that Amman Stock Exchange managed to overcome its adverse consequences. Since the event study tests for market efficiency, as well, the results show that Amman Stock Exchange reaction is consistent with the semi-strong form of the efficient market hypothesis.