• Journal of Electrical Engineering and Technology
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• v.11 no.5
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• pp.1108-1115
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• 2016

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.13-15
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• 2005

최근 윈도우의 취약점을 이용하는 웜 및 바이러스로 인한 정보시스템과 네트워크에 대한 피해가 급속히 증가하고 있다. 윈도우의 취약점을 이용한 공격에 대한 해결방법은 해당 취약점은 적시에 신속하게 패치를 설치하는 것이다. 본 논문에서는 기존의 패치관리시스템이 관리자의 개입을 요구하기 때문에 패치를 신속하게 적용할 수 없는 단점을 보완하여, XML 기술을 기반으로 MS 다운로드 센터에서 패치를 자동으로 다운받아 클라이언트까지 자동으로 보안패치파일을 설치하는 보안패치 자동관리 시스템을 제안한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.2
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• pp.122-129
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• 2013

This paper shows the method for simulating the two-way communication network to transmit information in Smart Grid, which is currently investigated by many researchers. The simulation method can be basically applied to analysis of data traffic for various electric devices such as smart meters, which were tested in Jeju island and massively deployed with nationwide scale.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.2
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• pp.95-101
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• 2013

The paper investigates the geometric effect of landmarks to the navigation error in the landmark based 3D vision navigation and introduces the INS/Vision integrated navigation system considering its effect. The integrated system uses the vision navigation results taking into account the dilution of precision for landmark geometry. Also, the integrated system helps the vision navigation to consider it. An indirect filter with feedback structure is designed, in which the position and the attitude errors are measurements of the filter. Performance of the integrated system is evaluated through the computer simulations. Simulation results show that the proposed algorithm works well and that better performance can be expected when the error characteristics of vision navigation are considered.

• IEIE Transactions on Smart Processing and Computing
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• v.6 no.2
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• pp.129-132
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• 2017

A conventional pulse oximeter has high power consumption; thus, its mobility is severely limited. In this paper, we discuss the drawbacks of the existing pulse oximeters and propose a new ultra-low-power pulse oximeter that supports wireless data transmission for remotely monitoring vital signs, such as peripheral capillary oxygen saturation (SpO2) and beats per minute (BPM). We could notably reduce power consumption by using a low-frequency single clock in all well-customized modules. Also, our device is publicly certified, and thus, possibly engaged in clinical trials for commercial use.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.11a
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• pp.134-136
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• 2019

본 논문에서는 사람의 내면상태 인식을 위한 상호작용 체계 구축을 위하여 사람의 감정 데이터를 효과적으로 수집하기 위한 프로토콜을 제안하고, 프로토콜에 따라 수집된 데이터에 대한 분석 및 결과를 제시한다. 감정 데이터 수집 프로토콜의 개발은 기존 문헌과 시스템 리뷰를 통한 감정분류체계 수립, 분류체계에 따른 감정 유발 영상 수집 및 신뢰도 확보, 감정 데이터 수집을 위한 인간 대상 실험 절차 구축 및 타당도 확보의 단계로 이루어졌다. 수집된 사람의 실시간 감정 데이터는 기계학습을 통한 감정 분류 연구의 기준으로 활용이 가능하다.

• Journal of the Korean earth science society
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• v.39 no.4
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• pp.378-387
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• 2018

In this research, the change of Korean middle-school science education environments is investigated through analyzing eighth graders' survey data collected over the past 20 years of TIMSS. We extracted educational context variables that provide meaningful information on changes of Korean science education, and have been surveyed more than 3 study cycles up to TIMSS 2015. The selected educational context variables include school resources and school climate from the school principal's questionnaires, and teacher characteristics and instructional activities from the teacher's questionnaires. For each context variable, we analyzed its trend over TIMSS cycles, and discussed its implications in light of Korean educational policy and curriculum changes. Based on the results, we recommended several ways that help to improve science teaching and learning in light of lab assistants, computer availability, teacher learning community, and middle school Earth science curriculum.

• Proceedings of the Korean Society for Language and Information Conference
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• 2002.02a
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• pp.205-216
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• 2002

ECM across a CP in Korean poses difficulties from the standpoint of the locality of A-movement/agreement. A phase-based analysis is developed which requires two steps: (i) in the embedded CP, VP/VP containing its VP-internal subject first moves to Spec-CP, which renders the subject accessible to the matrix v, in accordance with Chomsky's Phase Impenetrability Condition; (ii) ECM takes place in a local relation between the matrix v and the embedded subject. It is shown that the otherwise puzzling fact that ECM across a CP, but not Passivization across a CP, is affected by the type of the embedded verb in Korean is accounted for in a principled way, based on the assumption that CP and CP, but not TP and VP, are phases.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.27 no.2
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• pp.129-138
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• 2017

The subjective experiments on professional musicians using the four channel real-time convolution system were conducted to investigate the effect of reverberant sound pressure level ($L_{rev}$) for stage acoustics. The strength of $L_{rev}$ was changed to 2 dB steps to investigate the optimal strength for ease of performance and the subjective questionnaire survey was conducted to investigate the effect of subjective factor by $L_{rev}$. From the experimental results, a specific strength of $L_{rev}$ is related to ease of music performance. Loudness and directivity are highly correlated.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.8
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• pp.1104-1110
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• 2014

This paper investigates geometric effect of landmarks on three-dimensional navigation error in landmark-based vision navigation systems. Dilution of precision is derived for landmark measurement error on the focal plane of the camera and separately expressed in position DOP and attitude DOP. Values of DOP are observed for various configurations of landmarks.