• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.1175-1178
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• 2006

반도체 공정 자동화를 위해 SEMI에서 제창한 표준 규약인 SECS Protocol은 메시지 전송을 위한 규약인 SECS-I과 HSMS, 실제 통신되는 메시지에 대한 규약인 SECS-II로 구성된다. 하지만 SECS-I에서는 통신속도가 느리고, 근거리 통신만 가능하고, 호스트 컴퓨터와 설비간의 연결이 1:1로 이루어져야 하는 등 여러 가지 문제점도 있고 요즘에는 TCP/IP 기반의 HSMS Protocol 장비가 나오기 때문에 SECS-I을 HSMS로 변환시켜 주는 장치가 필요하다. 본 논문에서는 SECS-I 지원용으로 제작된 설비라도 HSMS를 지원할 수 있도록 하여 HSMS가 갖는 여러 가지 장점을 갖도록 하는 SECS-I/HSMS 변환방법에 관해 살펴본다.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.4
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• pp.46-55
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• 1997

This paper presents the development of intelligent performance management of computer communication networks for larger-scale integrated systems and the demonstration of its efficacy using computer simula- tion. The innermost core of the performance management is based on fuzzy set theory. This fuzzy perfor- mance manager has learning ability by using principles of neuro-fuzzy model, neuralnetwork, genetic algo- rithm(GA). Two types of performance managers are described in this paper. One is the Neuro-Fuzzy Per- formance Manager(NFPM) of which learning ability is based on the conventional gradient method, and the other is GA-based Neuro-Fuzzy Performance Manager(GNFPM)with its learning ability based on a genetic algorithm. These performance managers have been evaluated via discrete event simulation of a computer network.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.11-12
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• 2011

In electromagnetic coupled resonance(ECR) WPT system, the main key for wireless power transmission is the design method of the ECR coils. The ECR coils is classified to the helical coil(3D) type and the spiral coil(2D) type as a coil structure. The pattern of the spiral coil type has been studied in favor of commercialization. In this paper, the design characteristics of the helical coil and the spiral coil is considered using a Vector Network Analyzer. It is analyzed according to the distance of coupling coefficient between the ECR coils. Also, It is analyzed for the relationships such as the maximum transmission efficiency and the resonant frequency depending on the distance between the coils.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39A no.12
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• pp.771-773
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• 2014

Dual-polarization antenna system has been being researched for wireless communications under short range line-of-sight channel environments. In this paper, probability density function of signal-to-interference-ratio(SIR) for the dual-polarization antenna system is derived, and SIR outage is analyzed. It is shown that the upper bound capacity of a dual-polarization antenna system without polarization alignment is 4.5324 bps/hz.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.64-65
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• 2011

The ac power conversion inverter provides the ac power to ECR device for wireless power transfer. In this paper, the operating efficiency of the class-${\Phi}_2$ resonant inverter has been studied through by experiment for optimal design. Its switching frequency is 1MH and the input voltage is 96V which is the output voltage of LLC resonant converter. And its output voltage is 230Vp-p. The efficiency is measured up to 84%.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.10a
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• pp.243-246
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• 2000

Software Engineering covers techniques, tools, and methodologies needed to develop, acquire, and manage software in high quality, using appropriate resources. Therefore it can be said that the administration target of software engineering activities is the pursuit of high productivity for production of software in good quality. To do this, they should establish the engineering principle based on engineering theory and concept, and form the effective environment of engineering technology through improving development methods/methodology and tools of software engineering. In addition several guidances related to information system planning, acquisition, development, management, maintenance, and evaluation, etc. must be invented on the basis of software engineering to encourage efficiency of public information business yearly increasing fastand to make sure compatibility and interoperability.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2151-2152
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• 2006

초고속 인터넷과 무선 전송 등 통신기술이 급속히 발전되면서 보다 간편하게 건강 상태를 검진할 수 있는 방법에 대한 연구가 많이 진행되고 있다. 건강상태를 지속적으로 확인하기 위해서는 생체 신호 측정 장비의 높은 휴대성과 편리성, 정확한 측정이 가능해야 한다. 본 연구에서는 정확한 측정과 높은 휴대성을 위하여, 생체 신호 측정 장비를 소형화 및 저전력화를 실현하였고, 활동성을 위해 근거리 무선 통신 방식인 Bluetooth를 사용하였다. 개발된 유비쿼터스 무선 ECG 시스템은 일상적인 심전도 측정이 가능하여 협심증, 심근경색, 부정맥 등 심장질환의 조기 진단에 유용하게 사용 될 것이 기대된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.395-396
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• 2015

This paper preseints new pose analysis techniques that use a kinnect. This Viision-based system is augmented with a natural interface that enables the user to refine the suggested rectification. This makes it very easy for observer to execute fast and continuous commands.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.345-346
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• 2008

We analyzed the structural parameters of a guiding coil and a feeding loop for wireless power transfer in mid-range. The length, diameter, and number of turns of the guiding coil are the major factors to determine the resonant frequency. The separation distance between the coil and the loop also affects the power transfer ratio. This scheme has a greater transmission efficiency than using dipoles.

• Journal of the Korean Institute of Telematics and Electronics
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• v.27 no.6
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• pp.836-842
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• 1990

The noise currents in the load of cascaded transmission lines excited by a nearly small loop are analyzed and the effective approxiamte method by which we can calculate these currents easily and the computation time can be significantly reduced is developed. Numerical results for n=3 are well agreed with those of Smith by the maximum difference of 3-4dB and show that the length of a segment of line regarded to be illuminated by uniform electric fields should be 1.3 times the distance from the loop to the point midway between the conductors.