channel impact factor 접목한 BPSO 기반 최적의 EEG 채널 선택 기법

김준엽(Jun-Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),심귀보(Kwee-Bo Sim) 한국지능시스템학회 2012 한국지능시스템학회 학술발표 논문집 Vol.22 No.2

Channel Impact Factor 접목한 BPSO 기반 최적의 EEG 채널 선택 기법

김준엽(Jun-Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),심귀보(Kwee-Bo Sim) 한국지능시스템학회 2012 한국지능시스템학회논문지 Vol.22 No.6

본 논문은 brain-computer interface (BCI)를 통해 움직임 상상 시 측정된 뇌-활동전위신호(EEG)에 내포된 행동의도의 패턴을 보다 정확하게 분류하기 위한 최적 EEG 채널 선택 기법을 제안한다. 기존의 EEG 측정실험에서는 실험 설계자에 의해 대뇌 기능적 피질 분류를 이용하여 인위적으로 선별된 채널을 활용하거나 측정기기가 수용 가능한 전체 채널을 사용해왔으며, 일정 수준의 패턴 분류 정확도를 얻을 수 있었지만 다수의 채널로 인해 Common Spatial Pattern (CSP) 등의 패턴특징 추출 시 overfit 및 계산 복잡도 증가의 문제가 발생되었다. 이를 극복하기 위하여 방안으로 본 논문에서는 binary particle swarm optimization (BPSO)을 기반으로 다수의 채널 중 최적 채널을 자동으로 선택하고, 각각의 채널에 대한 impact factor를 부여함으로써 중요 채널 부근의 채널들에 가중치를 부여하는 선택방법을 제안하였으며, Support Vector Machine (SVM)을 이용하여 다수의 채널을 사용 하였을 때의 정확도와 channel impact factor를 고려한 BPSO를 적용시켰을 때의 정확도를 비교, 분석하였다. Brain-computer interface based on motor imagery is a system that transforms a subject’s intention into a control signal by classifying EEG signals obtained from the imagination of movement of a subject’s limbs. For the new paradigm, we do not know which positions are activated or not. A simple approach is to use as many channels as possible. The problem is that using many channels causes other problems. When applying a common spatial pattern (CSP), which is an EEG extraction method, many channels cause an overfit problem, in addition there is difficulty using this technique for medical analysis. To overcome these problems, we suggest a binary particle swarm optimization with channel impact factor in order to select channels close to the most important channels as channel selection method. This paper examines whether or not channel impact factor can improve accuracy by Support Vector Machine(SVM).

운동심상 BCI 시스템을 위한 PSO 기반 최적의 EEG 채널 선택 기법

김준엽(Jun-Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),심귀보(Kwee-Bo Sim) 한국지능시스템학회 2012 한국지능시스템학회 학술발표 논문집 Vol.22 No.1

PSO를 이용한 인공면역계 기반 자율분산로봇시스템의 군 제어

김준엽(Jun Yeup Kim),고광은(Kwang-Eun Ko),박승민(Seung-Min Park),심귀보(Kwee-Bo Sim) 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.5

This paper proposes a distributed autonomous control method of swarm robot behavior strategy based on artificial immune system and an optimization strategy for artificial immune system. The behavior strategies of swarm robot in the system are depend on the task distribution in environment and we have to consider the dynamics of the system environment. In this paper, the behavior strategies divided into dispersion and aggregation. For applying to artificial immune system, an individual of swarm is regarded as a B-cell, each task distribution in environment as an antigen, a behavior strategy as an antibody and control parameter as a T-cell respectively. The executing process of proposed method is as follows: When the environmental condition changes, the agent selects an appropriate behavior strategy. And its behavior strategy is stimulated and suppressed by other agent using communication. Finally much stimulated strategy is adopted as a swarm behavior strategy. In order to decide more accurately select the behavior strategy, the optimized parameter learning procedure that is represented by stimulus function of antigen to antibody in artificial immune system is required. In this paper, particle swarm optimization algorithm is applied to this learning procedure. The proposed method shows more adaptive and robustness results than the existing system at the viewpoint that the swarm robots learning and adaptation degree associated with the changing of tasks.

정보화시대의 경쟁력 있는 인적자원 육성을 위한 한국의 정보통신기술교육

김준엽 ( Jun Yeup Kim ) 국제지역학회 2014 국제지역연구 Vol.18 No.4

본 논문은 한국정부가 어떻게 정보통신기술을 교육에 활용하였는지를 분석하고 이를 바탕으로 정보통신기술교육이 정보화시대의 경쟁력 있는 인적자원육성에 어떠한 영향을 주었는지에 대해서 검증하고자 한다. 본 연구에서 한국은 정책적으로 정보통신기술을 교육에 통합적으로 활용하였음이 실증분석을 통해서 입증되었다. 또한 리커르트척도 (likert-scale self assessment)를 이용한 설문조사를 통해서 정보통신기술교육은 경쟁력 있는 기술인력 육성에 상당한 영향을 주었음이 검증되었다. This paper analyzes how Korean government used ICT in education and estimates its impact on the competitiveness of human resources in meeting the challenges of the information age. The study proved that government policy has successfully integrated ICT in education. In addition, we proved that integrating ICT in education has substantially improved the competitiveness of workforce, using ‘likert-scale self assessment’ survey amongst school graduates in Korea.

UN 지속가능개발목표(SDGs)와 표준의 기여와 역할

김준엽(Jun Yeup Kim),이희진(Hee jin Lee) 국제개발협력학회 2018 국제개발협력연구 Vol.10 No.3

표준은 지속가능개발목표를 달성하는 데 중요한 역할을 할 수 있는 기반이 되는 사회 제도이며한 사회의 질서 확립에 기여하고, 비효율성을 줄여서 사회나 산업의 발전에 중요한 역할을 한다. 따라서 표준체계의 확립은 개발도상국 발전에도 토대가 된다. 특히 경제적인 측면에서 개발도상국의 제조 기업들이 국제 산업 가치사슬에 진입하기 위해서는 국제 수준의 환경, 품질 표준 및 인증을 획득하거나, 제품 품질을 담보할 수 있는 표준 및 인증 시스템을 개발하는 것이 필요하다. 이를 돕기 위해 무역원조(Aid for Trade)에서 표준 부문 원조의 중요성이 증가하고 있다. 또한 국제표준화기구들도 SDGs 달성에 기여하기 위해 다양한 노력을 경주하고 있다. 이런 배경에서, SDGs의 달성에 표준이 어떤 역할을 할 수 있을 것인가는 표준 및 표준화 연구의 지평을 넓히고, 새로운 표준 정책 아젠다를 발굴하는 데 기여할 수 있는 의미있는 연구 주제다. 또한 국내외를 통틀어 SDGs의 달성에 표준화가 기여했고, 또 기여할 수 있는 다양한 주제와 방식, 그리고 그 함의를 심도 있게 다룬 연구들은 아직 미미한 상황에서 국제사회의 주요 의제에 대응하기 위한 다양한 시각을 점검할 수 있다는 점에서 그 시의성 또한 높다. 기존에 연구되던 표준 및 표준화의 연구 주제를 SDGs의 틀 속에서 새롭게 해석하거나, 혹은 SDGs의 목표들 중에서 표준화를 새로운 문제해결의 방식으로서 적용해 보는 시도들은 우리사회의 지속가능한 전환을 위한 토대 역할을 할 것으로 판단된다. The Sustainable Development Goals (SDGs), announced at the UN General Assembly in 2015 under the consensus of the world leaders, are a new international agenda that is expected to play a role in standardization and standardization. Sustainable development means development that allows the present generation to meet the needs of future generations without compromising their ability to meet their needs (Brundtland, 1987) Emphasize the balance between the three pillars of social development, environmental sustainability and economic growth. The SDGs thus define the 17 challenges and 169 goals that the international community will face today and address specific implementation measures to achieve them over the next 15 years to 2030. In this context, what role the standard can play in achieving SDGs is a meaningful research topic that can broaden the horizons of standard and standardization research and contribute to the discovery of a new standard policy agenda. In addition, standardization has contributed to the achievement of the SDGs at home and abroad, and the various themes and methods that can contribute to and the implications of the implications are still under investigation. ), The timing is also high. Attempts to reinterpret the research topics of existing standards and standardization in the framework of SDGs, or to apply standardization among the goals of SDGs as a new problem solving method, serve as the foundation for the sustainable transition of our society.

지능형 멀티 에이전트 로봇시스템을 위한 통신시스템의 설계

김준엽(Jun-Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),장인훈(In-Hun Jang),심귀보(Kwee-Bo Sim) 제어로봇시스템학회 2012 제어·로봇·시스템학회 논문지 Vol.18 No.8

In the ad-hoc wireless network environment, that the fixed sensor nodes and the sensor nodes to move are mixed, as the number of the sensor nodes with mobility are getting more, the costs to recover and maintain the whole network will increase more and more. This paper proposed the CDSR (Cost based Dynamic Source Routing) algorithm being motivated from the typical DSR algorithm, that is one of the reactive routing protocol. The cost function is defined through measuring the cost which any sensor node pays to participate in the whole network for communication. It is also showed in this paper that the proposed routing algorithm will increase the efficiency and life of whole sensor network through a series of experiments.

Genetic Algorithm 기반 최적의 EEG 채널 선택 기법

김준엽(Jun-Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),심귀보(Kwee-Bo Sim) 한국지능시스템학회 2013 한국지능시스템학회 학술발표 논문집 Vol.23 No.1

Support Vector Machine 기반 Genetic Algorithm과 Binary PSO를 이용한 최적의 EEG 채널 선택 기법

김준엽(Jun Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),심귀보(Kwee-Bo Sim) 제어로봇시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.6

BCI (Brain-Computer Interface) is a system that transforms a subject’s brain signal related to their intention into a control signal by classifying EEG (electroencephalograph) signals obtained during the imagination of movement of a subject’s limbs. The BCI system allows us to control machines such as robot arms or wheelchairs only by imaging limbs. With the exact same experiment environment, activated brain regions of each subjects are totally different. In that case, a simple approach is to use as many channels as possible when measuring brain signals. However the problem is that using many channels also causes other problems. When applying a CSP (Common Spatial Pattern), which is an EEG extraction method, many channels cause an overfitting problem, and in addition there is difficulty using this technique for medical analysis. To overcome these problems, we suggest an optimal channel selection method using a BPSO (Binary Particle Swarm Optimization), BPSO with channel impact factor, and GA. This paper examined optimal selected channels among all channels using three optimization methods and compared the classification accuracy and the number of selected channels between BPSO, BPSO with channel impact factor, and GA by SVM (Support Vector Machine). The result showed that BPSO with channel impact factor selected 2 fewer channels and even improved accuracy by 10.17~11.34% compared with BPSO and GA.

The Strategy of Colombians Natural Disaster Management: Case of Putumayo

( Kira Potowski ),김준엽 ( Jun Yeup Kim ) 국제지역학회 2015 국제지역연구 Vol.19 No.3

The study illustrates that the Colombian natural disaster management neither on the national nor on the regional and local government level is satisfying the need of a well-working natural disaster management system in order to reduce risk before a disaster and provide immediate aid and rehabilitation actions afterwards. Meanwhile Japan is globally recognized for its efficient system various ideas should be immediately adapted by the different Colombian government levels. In order to improve its current disaster management practices, the Colombian government has to integrate the regional and local level much stronger into the whole natural disaster management system. The current evaluations on the natural disaster management in Colombia focus on the national government policies only. This paper goes further and observes the current state of actions on the regional and local level before, during and after a natural disaster. By benchmarking actions realized in Japan valuable recommendations for Colombian government officials on the national and local level are developed.