• Information and Communications Magazine
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• v.25 no.9
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• pp.32-40
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• 2008

본고에서는 현재 3GPP (3rd Generation Partner Project)에서 표준화 작업이 마무리중인 LTE (Long Term Evolution) 시스템에서 Medium Access Control의 구조, 절차 및 PDU 포멧 등에 대해 알아본다.

• Proceedings of the Korean Vacuum Society Conference
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• 2008.02a
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• pp.369-369
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• 2008

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2009.04a
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• pp.107-108
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• 2009

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2014.11a
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• pp.12-12
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• 2014

Atomic layer etching system를 이용하여 $MoS_2$를 layer by layer control를 하였다. 이 방법이 전통적인 에칭에 비해서 low damage 층간 식각이 가능하였다.

• Proceedings of the KIPE Conference
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• 2009.11a
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• pp.252-255
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• 2009

This paper proposes a new loss minimization controller (LMC) for induction motor drive. The proposed LMC presents a strategy to minimize the total power losses of induction motor (IM), which is based on simplified equivalent circuit and simplified model of IM. The proposed controller using the field oriented control (FOC) method is to determine an optimal rotor flux for obtaining the minimum total power losses and higher efficiency. Simulation and experimental results are given to validate the effectiveness of the proposed method.

• Electronics and Telecommunications Trends
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• v.21 no.6 s.102
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• pp.95-103
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• 2006

IMS는 현재 All IP 기반의 차세대 통신 환경에서 새로운 서비스를 제공하기 위한 핵심기술로 자리잡고 있다. 본 고에서는 3GPP에서 이동통신망의 제어를 위해 개발되고, TISPAN의 NGN에 의해 유선망에 적용될 수 있도록 수정 보완 되었으며, ITU-TNGN 구조에도 반영되는 등 IP 기반의 유무선 통합망에서의 표준 플랫폼이 된 IMS의 기술 동향을 살펴봄으로써 유무선 통합뿐 아니라 방송 통신 융합을 도모하는 BcN에서의 서비스 제어 구조 연구 방향을 모색하고자 한다.

• Journal of Institute of Control, Robotics and Systems
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• v.7 no.9
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• pp.774-782
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• 2001

In this paper, we propose a new approach to the autonomous and high-speed indoor navigation of wheeled mobile robots using hybrid system controller. The hierarchical structure of hybrid system presented consists of high-level reasoning process and the low-level motion control process and the environmental interaction. In a discrete event system, the discrete states are defined by the user-defined constraints and the reference motion commands are specified in the abstracted motions. The hybrid control system applied for the nonholonomic mobile robots can combine the motion planning and autonomous navigation with obstacle avoidance in the indoor navigation problem. For the evaluation of the proposed algorithm, the algorithm is implemented to the two-wheel driven mobile robot system. The experimental results show that the hybrid system approach is an effective method for the autonomous navigation in indoor environments.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.680-682
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• 1993

In this paper, rotor flux feedforward control of induction motor fed by cycloconverters with high frequency LC resonant circuits is presented. The cycloconverter using new current control algorithm as a power source of induction motor drive system is proposed. And then its validity of the application to induction motor control system is verified by experimental results.

• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.83-85
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• 1994

This paper describes the dual mode control of the LDM(Linear DC motor) for carrier. The dual mode control consists of seek and analogue control. In seek mode, LDM is moved in the shortest time by switching line, and in analogue mode keeps at origion with high accuracy. We proposed different switching line method according to driving direction.

• Proceedings of the KIEE Conference
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• 1995.07a
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• pp.74-76
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• 1995

This paper describes the precise position control of the linear DC motor for carrier. We analyze the switching line of seek mode control and propose the modified switching line according to the mass and distance. Experimental results demonstrate that good performance is achieved by the proposed controller.