• 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 KIEE Conference
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• 2011.07a
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• pp.832-833
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• 2011

Interior Permanent Magnet Synchronous Motor (IPMSM) produces two kind of torque that Magnetic and Reluctance torque. The permanent magnet linkage flux and d-axis and q-axis inductances have an important influence on the torque characteristic of IPMSM. Thus their accurate prediction is essential for predicting performance aspect such as the torque and flux-weakening capabilities. In this paper, is calculated by LC resonance method with FEM. The results are validated by comparison the calculated by another method.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.842-843
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• 2011

Winding methods of the interior permanent magnet synchronous motor for vehicle traction have two kinds. They are concentrated winding and distributed winding. They have merits and demerits and influence motor performance. Therefore, this paper present designs that concentrated winding and distributed winding motor what they have same capacity. And each motor characteristic was analyzed by finite element analysis.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.846-847
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• 2011

This paper presents the study on analysis of single phase induction motor characteristics by equivalent circuit. For high efficiency of single phase induction motor, the motor parameters used for equivalent circuit analysis is important. The accuracy of equivalent circuit analysis of motor depends on the circuit parameters like saturation factor. Therefore this paper proposed the analysis method considering saturation factor. The saturation factor was calculated by iteration routine and numerical method. this proposed method was verified by FEM analysis results and dynamo test results of the prototype model.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.854-855
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• 2011

In this paper, Interior permanent magnet synchronous motor(IPMSM) with concentrated winding for 110cc electric motorcycle is introduced. Optimum design is performed so as to satisfy wide speed operation range. And output characteristics is analyzed according to shoe height in many variables. Because partial magnetic saturation in shoe affects the harmonics, output characteristics of motor could be confirmed that a significant change. As a result, the new shape and the optimal design parameters considering the partial magnetic saturation is obtained. Compared with the base model, wide operating range was confirmed.

• Journal of the Korea Institute of Military Science and Technology
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• v.7 no.4 s.19
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• pp.87-90
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• 2004

In order to elucidate the mechanism of infection on human macrophages, we peformed the 2-dimensional electrophoresis and the western blot analysis using the infected human macrophages with the spores of live and inactivated Sterne. We confirmed P21-activated kinase 2 protein which related to cell death(apoptosis) human macrophages at the early stage events. The inhibition of the P21-activated protein kinase 2 protein will be reduced apoptosis on infected human macrophages with Sterne spores.

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.16-18
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• 2006

유한요소법을 사용한 전기기기의 해석에서는 움직임을 고려한 해석이 필수적이다. 본 논문에서는 전기기기의 유한요소 해석시 움직임을 고려하기 위한 방안으로써 Moving Suface기법을 소개하고 이 기법의 적용방법 및 장단점에 관하여 논하였다. 또한 이 기법을 검증하기 위하여 Moving Surface기법을 적용한 유한요소해석 프로그램을 개발하고, 개발한 프로그램을 사용하여 실제 모델을 해석해 그 결과치를 실험치와 비교함으로써 타당성을 입증하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10c
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• pp.629-632
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• 2006

기존의 무선 네트워크에 비해 빠르고 저렴하며 설치가 편리한 무선 메쉬 네트워크를 인터넷망 구성에 도입하려고 하는 것이 최근의 경향이다. 무선 메쉬 네트워크는 이종망간의 네트워크를 통합함으로 수많은 클라이언트들을 통제해야하며 기존의 IPv4 주소는 10년 내에 고갈이 됨으로, IPv6 주소 환경에 적합하게 연구 개발하여야 한다. 그러나 아직 무선 메쉬 네트워크는 개발 중인 기술로써 보완해야할 보안상의 문제점들이 발견되고 있다. 본 논문에서는 무선 메쉬 네트워크에 MIPv6를 어떻게 도입할지를 언급하고 MIPv6 도입 시에 발생하게 되는 보안상의 문제점을 SEND(SEcure Neighbor Discovery)와 MCGAs를 이용하여 해결하는 방법을 소개한다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.766_767
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• 2009

Generally, the Doubly Salient Machine such as Switched Reluctance Motor doesn't have Permanent Magnet, it sometimes adopts permanent magnet or DC filed winding for high efficiency or adjustable speed control. In this paper, adjustable speed range is compared for Doubly Salient Permanent Magnet Machine (DSPM), Brushless Doubly Fed Doubly Salient Machine (BDFDS) and Hybrid Excited Doubly Salient Machine (HEDS). Especially, air-gap flux density to the DC field current is shown and the operating speed as the field-weakening is estimated.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.768_769
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• 2009

Average torque of PMa-SynRM(Permanent Magnet-assisted Synchronous Reluctance Motor) is changed by magnet form inserted to the barrier. Because the magnet form influences to the magnet-torque and reluctance torque. Therefore, this paper present a suitable permanent magnet form design for maximum torque when the magnet quantites are always fixed. And each motor characteristic such as average torque, torque ripple, cogging torque and back-EMF are analyzed by FEM(Finite Element Method) for optimal design..