• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1008-1010
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• 2013

본 논문에서는 스마트폰과 OPRoS를 이용해 DARwIn-OP 로봇을 제어하는 어플리케이션의 개발에 대해 연구하고 스마트폰 어플리케이션에 적용하여 동작을 확인하였다. OPRoS 컴포넌트를 이용해 스마트폰 어플리케이션과 연동되는 로봇 어플리케이션을 구현하고, DARwIn-OP에 적용하여 스마트폰을 이용해 원격으로 제어하는 어플리케이션을 구현하였다. OPRoS 컴포넌트를 사용하여 개발 시간의 단축과 비용의 절감을 얻을 수 있었으며 스마트폰을 이용하여 DARwIn-OP의 머리, 팔, 다리를 제어하는 것을 확인하였고 머리에 장착된 웹캠을 이용해 DARwIn-OP의 시야에 있는 물체를 확인하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.733-736
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• 2009

Power Line Communication(PLC) is need not additional communication line. So establishment expense is inexpensive and application is simple. Therefore, lower part network of various application field is possible. However, there are high subordinate interference and noise problem on limited transmission data and communication interference element. Wireless Sensor Network(WSN) is need not infrastructure, Self-regulating network architecture of sensor nodes is possible. So at short time, network construction is available. But, power consumption is increased by active sensing for QoS elevation and unnecessary information transmission, low electric power design and necessity of improve protocol are refered to life shortening problem and is studied. In this paper, supplement problem of power line communication and wireless sensor network mutually and because advantage becomes linkage integration control system using synergy effect of two technologies as more restriction be and tries to approach structurally control network that is improved for smooth network environment construction. Honeywell's hybrid sensor network does comparative analysis(benchmarking). Confirm performance elevation proposing teaming of power line communication and wireless sensor network. Through simulation, service delay decreases and confirms that performance elevation.

• The Journal of Information Technology
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• v.4 no.1
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• pp.39-54
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• 2001

Knowledge can be characterized in many ways. We have categorized internal and external knowledge by its position, tacit and explicit knowledge by the degree of formalization, and general and innovative knowledge by the power of competitive advantage. They is, often, mixed in real world. Under New Economy, firms must conduct the analysis of various knowledge embodied employee's skill, its products and business process, and create a new added value. Knowledge is the important strategic resource and the ability to capture, organize, store and apply is the critical capability for substantial competitive advantage. For establishing the steps of knowledge management strategy, we described below - the identification of intellectual capital, value analysis, the building of knowledge infrastructure, the knowledge organization, value creation, and the knowledge evaluation and dynamic knowledge management.

• The Journal of the Korea institute of electronic communication sciences
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• v.3 no.4
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• pp.266-275
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• 2008

The sensorless speed control technique for BLDC motor using digital IP control is proposed in this paper for advanced speed characteristic which is robust to motor parameters and load variations. The sensorless drive of BLDC motor using terminal voltages is affected by load or speed because it uses analog filters to estimate the rotor position. For this reason, the robust speed controller with the accurate rotor position estimator is needed for sensorless control which is robust to load and insensitive to motor parameters. The constant speed robust to load variation and the stable sensorless control of BLDC motor robust to the increase or decrease of speed with constant load is implemented using digital IP control in this paper. The validity to these is established with experimentation.

• KSBB Journal
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• v.5 no.3
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• pp.307-313
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• 1990

A microcomputer-aided fermentation system was constructed for high density fed-batch culture using dissolved oxygen(DO) as a substrate feeding indicator. DO signal was processed prior to aquisition to computer. Agitation speed and oxygen flow rate was changed stepwisely to maintain DO value at a constant level. Agitation speed was controlled by the output signal of D/A converter. Oxygen flow rate was controlled by a flow rate control valve connected to a stepping motor. Substrate was fed with a feeding pump operated by the abrupt increase of DO signal. Methylobacillus sp. SK1 was cultivated to test the system and 16.53g/l of cell density was obtained after 10 hr.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.457-465
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• 2019

This paper present developing methods of man-machine interface(MMI) system for smart temperature controller with android platform. This MMI system could communicate with mobile machine. Firstly we present electrical hardware design method of MMI system of smart temperature controller. Smart temperature controller is composed of dual processors. Secondly we develop operating software of MMI system using android development environment. And finally we present verification of MMI systems of smart temperature controller with android platform through field experiment. This MMI system with android platform has rapid development speed due to performance of android platform.

• Electronics and Telecommunications Trends
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• v.28 no.4
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• pp.79-85
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• 2013

최근 스마트폰을 포함한 스마트 디바이스의 급속한 확산에 따라 모바일 통신 산업의 패러다임이 '음성통화'에서 '어플리케이션'으로 전환되고 있으며, 소비자들의 정보에 대한 인식이 "개발, 공유, 참여, 확산" 과정을 통한 개인화와 라이프 스타일의 변화 추구를 위한 용도에 많은 관심을 가지기 시작했다. 특히, 최근의 사물인터넷의 부각으로 인해 IoT(Internet of Things)와 스마트 디바이스와의 연동을 통해 주변의 센서로부터 수집된 정보를 직접 가공 처리하거나 제어하는 개인 중심의 생활밀착형 센서 앱 서비스를 제공하려는 다양한 시도가 이루어지고 있다. 본고에서는 스마트 디바이스에서의 센서와의 연동 및 적용 사례와 함께 IoT와의 융합기술 국내외 동향 등을 살펴보고자 한다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.11a
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• pp.422-427
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• 2006

This paper presents force-feedback control performance of a haptic device in virtual environment of minimally invasive surgery(MIS). As a first step, based on an electrorheological(ER) fluid and spherical geometry, a new type of master device is developed and integrated with a virtual environment of MIS such as a surgical tool and human organ. The virtual object is then mathematically formulated by adopting the shape retaining chain linked(S-Chain) model. After evaluating reflection force, computational time, and compatibility with real time control, the virtual environment of MIS is formulated by interactivity with the ER haptic device in real space. Tracking control performances for virtual force trajectory are presented in time domain, and theirtrackingerrorsareevaluated.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04c
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• pp.570-572
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• 2003

체감 효과 (haptic effect)는 가상 환경에서의 실재감 부여를 위하여 중요시되고 있다. 반면, 가상 객체에 실재와 흡사하게 연동하는 기술은, 체감 효과의 모델링과 함께 렌더링 시간 둥의 문제 때문에 사용의 한계를 가진다. 본 논문에서는, 실시간 체감 효과를 위하여 필수적인 가상 객체와의 동기화 기법에 대하여 다룬다. 이를 위하여, 가상 객체에 작용하는 동역학적 움직임을 체감 효과에 대응되도록 하는 알고리즘을 제안하고, 이를 실시간 충들 처리와 연동함으로써 필요한 시간을 최소화 할 수 있음을 제시한다. 본 논문의 결과로는 캐릭터의 빈번한 제어에 대응되도록 체감 효과를 생성할 수 있음을 보이며, 안정적이면서 그럴 듯한 효과를 재현할 수 있음을 보인다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.627-630
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• 2006

정보사회에서 인터넷을 기반으로 한 IT관련 기술의 빠른 증가와 더불어 유비쿼터스 환경의 연구 또한 점점 가시화 되어 지고 있다. 이와 더불어, 웹 기반의 분산 컴퓨팅 환경 내에서 관련 정보들의 수집, 보관, 공유, 이동이 활발해지면서, 개인정보의 불법적 유출, 남용에 따른 사생활 침해문제를 해결하기 위한 방안에 관심이 집중되고 있다. 이에 본 논문에서는 유비쿼터스 환경 내에서의 신뢰할 수 있는 개인정보 아키텍처를 구현하기 위한 3단계의 개인정보 보호 메커니즘/통합사용자 인증 메커니즘 CAM(Consolidated Authentication Mechanism), 개인정보정책 메커니즘 PPM(Privacy Policy Mechanism), 개인정보 통제 메커니즘 OCM(Output Control Mechanism)을 제시하였다. 또한 사용자에게 개인정보 사용시 정보의 중요도에 따른 "알림(Notice)" 기능을 웹 브라우저 내 개인정보 적용 기술(P3P)과 연동하여 제공하고, 접근 제어하는 기술적 적용 방안을 소개함으로써 개인 정보의 연동시 오 남용 방지 방안과 시스템 환경 내 실용 가능성(feasibility)을 소개하였다.