• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.3
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• pp.181-188
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• 2011

With the rapid proliferation of wireless networks and mobile computing applications, the landscape of the network security has greatly changed recently. Especially, Vehicular Ad Hoc Networks maintaining network topology with vehicle nodes of high mobility are self-organizing Peer-to-Peer networks that typically have short-lasting and unstable communication links. VANETs are formed with neither fixed infrastructure, centralized administration, nor dedicated routing equipment, and vehicle nodes are moving, joining and leaving the network with very high speed over time. So, VANET-security is very vulnerable for the intrusion of malicious and misbehaving nodes in the network, since VANETs are mostly open networks, allowing everyone connection without centralized control. In this paper, we propose a weighted intrusion detection method using rough set that can identify malicious behavior of vehicle node's activity and detect intrusions efficiently in VANETs. The performance of the proposed scheme is evaluated by a simulation study in terms of intrusion detection rate and false alarm rate for the threshold of deviation number ${\epsilon}$.

• Korean Journal of Cognitive Science
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• v.30 no.2
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• pp.85-104
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• 2019

Past research showed that presence of others induces morally desirable behavior and stricter judgments. That is, presence of others makes people become a moral being. On the other hand, little research has been conducted to test what effects facial expression of others have on moral judgments. In this research, we tested the effects of emotion exposed by facial expression on moral judgments. To this end, we presented descriptions of immoral or prosocial behavior along with facial expression of various emotions (in particular, disgust and happiness), and asked participants to make moral judgments on the behavior in the descriptions. In Experiment 1, facial expression did not affect moral judgments, but variability of judgments was increased when descriptions and facial expression were incongruent. In experiment 2, we modified potential reasons of the null effect and conducted the experiment using the same procedure. Subjects in Experiment 2 made stricter judgments with disgust faces than with happy faces for immoral behavior, but the effect did not occur for prosocial behavior. In Experiment 3, we repeated the same experiment after having subjects to consider themselves as the actor in the descriptions. The results replicated the effects of facial expression in Experiment 2 but there was no effect of the actor on moral judgments. This research showed that facial expression of others specifically affects moral judgments on immoral behavior but not on prosocial behavior. In general discussion, we provided further discussion on the results and the limitations of this research.

• Journal of the HCI Society of Korea
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• v.13 no.2
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• pp.5-20
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• 2018

The fully autonomous vehicle, which has been actively studied in a worldwide before commercialization, is expected to become a living space by securing time and space compared to existing automobile. For this reason, interior design of fully autonomous vehicle has become very important. To enhance passenger's experience and satisfaction in fully autonomous vehicle, it is necessary to design an optimized space that can support in-vehicle activities. For this purpose, efforts to analyze the passenger's in-vehicle activities should be preceded. However, there were limited studies that define space and in-Vehicle activities of fully autonomous vehicle in Korea. The purpose of this study is to suggest the guideline of the interior design of fully autonomous vehicle by analyzing and classifying the scope of activities that the passenger can perform within the vehicle. As a method of the study, literature studies on future concept cars, human lifetime behavior and consumer needs had been conducted. As a result in-vehicle activities could be applied in a fully autonomous vehicle. Four in-vehicle activities 'work', 'home life and personal care', 'relaxation' and 'conversation and hobby' had been derived through the analysis of in-vehicle activities. Based on the results, the interior design of fully autonomous vehicle guideline has been suggested. The study is significant because the result of the study can act as a basic study which considers the activities in the fully autonomous vehicle environment.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.277-280
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• 2004

최근 디지털 가전과 모바일 컴퓨팅이 화두로 떠오르면서 내장형 기술이 전성기를 맞이하고 있으며, 다양한 내장형 시스템들간의 상호 운용성, 플랫폼 독립성과 이식성을 지원할 수 있는 환경을 제공하는 내장형 미들웨어의 중요성이 부각되고 있다. 미들웨어는 신뢰성, 안전성, 보안성, 실시간성 등과 같은 기능에 직접 포함되지 않는 비기능적 요구를 응용 분야에 따라 요구할 수 있으며, 그 때마다 다양한 비기능적 요구에 맞는 미들웨어를 각기 따로 개발하는 것은 지극히 어려운 일이다. 따라서, 비기능적 요구에 적합하게 미들웨어를 동적으로 재구성하는 컴포넌트 개발 방법이 주목 받고 있으며, 이를 통해 재구성된 내장형 미들웨어에서는 비기능적 요구인 실시간성이 요구되므로, deadline 만족 여부를 확인하는 스케쥴링 분석이 중요하다. 많은 최적의 스케쥴링 분석 알고리즘이 존재하나 그들 중 어느 것도 동적 재구성이 될 때 태스크 집합상의 가정(assumption)이 변경되는 내장형 미들웨어를 만족 시킬 수 없다. 가정에 적합한 스케쥴링 알고리즘으로 대체하기 위한 제안들은 대부분 정적 조립 환경에서 새로운 버전에 의해 기존 클래스를 교체하는 코드 수정에 기반하나, 동적 재구성을 통해 행위를 변경하는 내장형 미들웨어에서는 응용하기 어렵다. 따라서, 본 논문에서는 동적 재구성 환경에서 수행되는 내장형 미들웨어를 위해, 적합한 스케쥴링 알고리즘으로 대체 할 수 있는 스케쥴러를 런타임 컴포넌트 개조 기술 중 하나인 Type-safe delegation이 적용된 strategy 패턴을 기반으로 설계하였으며, 이를 통해 내장형 미들웨어 스케쥴러의 유연성과 확장성을 증가하는 방안을 제시하였다.

• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.193-203
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• 2015

This study aims to analyze why South Korea has not used audit system but examination system and suggest policy reform for the system on the institutional context perspective. Institutional context is structured down to institutional legacy, motives, institutional constraints, actors' roles, and changed institution. I researched the literature on the subject and collected research materials from the Department of the Treasury and Audit Office website of New Zealand, Australia, United Kingdom, United States and South Korea. These were analyzed using for suggesting realistic and effective policy. Analysis showed that South Korea has used examination system due to institutional constraints and tried to increase reliability of financial statements by enlarging the meaning of examination, strengthening the ability of the Board of Audit and Inspection, enacting government examination standards, and making a comprehensive public announcement. Comparing with other countries where government audit systems are applied, there are still some vulnerable points in South Korea. In order to make up for the shortcomings, this study suggests several points: strengthening the ability of actors; systemizing internal control; expressing opinion; making a more comprehensive public announcement. It would be desirable for making further detailed studies of the points.

• Korean journal of communication and information
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• v.56
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• pp.156-174
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• 2011

Empathic concern is a major psychological factor which activates motives for help. This study investigates how the impact of empathic concern, as a personal trait, and the interaction with positive/negative framing influences responses towards help campaigns. Experiments with 176 subjects were conducted and the data were analyzed focusing on the role of anticipated emotions(satisfaction and guilt). The results were that people high in empathic concern showed larger anticipated satisfaction and behavioral intention compared to people low. The main effect was weak for anticipated guilt. Evidence suggests that anticipated satisfaction mediate the influence of the interaction of empathic concern and framing on behavioral intention. Anticipated guilt did not appear to act as an mediating variable. The theoretical and practical implications are discussed.

• Korean Journal of Cognitive Science
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• v.23 no.1
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• pp.109-132
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• 2012

According to recent embodied cognition approach, understanding of actions is not based on abstract symbolic process but based on mental simulation of sensory-motor information related to those actions. As supporting evidence, motor resonance effect is a facilitation/interference effect of motor response in terms of similarity between observed action and concurrent own action. In the current research, we investigated this effect in the situation to perceive a complex social action perception and how it would be modulated by perspectives of construals of the social action scene. For this purpose, we created three kinds of fighting action scenes of two people in terms of body actions of the subject(ie., hitting, stepping, biting), and described them in two perspectives; active and passive. During the experiment, subjects had to verify the congruency of the picture and the description first, and if they are congruent, they had to do two different actions in terms of color of following cues. In the first experiment, subjects' response time for stepping on a pedal and pressing a button were analyzed for measuring motor resonance effect for the foot movement. In the second experiment, voice response time with a microphone and button pressing time were analyzed for the mouth movement motor resonance effect. Results showed the facilitation of the foot movement(in Exp1), and the mouth movement(in Exp2) only when the action scene was described in active perspective. Our results indicate that the motor resonance effect can be occurred during perception of social actions in the real life situation, but it can be also modulated by the perspective of the mental construal of the action event.

• Proceedings of the Korean System Dynamics Society
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• 2004.02a
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• pp.83-108
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• 2004

ㆍ정부규제의 개념 -정부 규제는 민간활동 주체의 행위를 유인 또는 강제함으로써 공익을 실현하는 수단 -외부 경제효과, 독과점에 의한 폐해, 담합 담지 등을 통한 소비자 효익 증진이 목적 -산업 경쟁력 저하하는 비능률적 관행으로 인식 ㆍ이동 통신 시장에서의 정부 규제 -비대칭으로 특징지워지는 많은 규제 이슈들이 제기되고 있음 -이는 다음의 경쟁 특성에 기인함 (1) 자본 집약성으로 인한 과점적 시장 구조 (2) 번호 이동성의 결여 (3) 네트워크 효과 (4) 상호접속을 통한 경쟁사간 생산요소 공급 (5) 주파수 대역의 희소성(중략)

• Journal of Popular Narrative
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• v.27 no.1
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• pp.133-185
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• 2021

This study is an attempt to connect television drama M, which deals with abortion issues, with theoretical focus such as materiality, relativity, and agency, to understand diffractively as an cartography of agential reality. According to Karen Barard's Agential Realism, Television drama M is a sociocultural phenomenon produced by the agential intra-actions of material-discursive apparatuses such as medical technology, ghost stories and legends, and male-affect. The 1990s repeatedly revealed "hate" through apparatuses such as technology, discourse, and affect, which are directed at women's gendered bodies. The material -discursive practice of plastic surgery and abortion proves that the agential reality surrounding the body is closely intertwined with medical technology, as well as with the genderized hate. Another related material-discursive phenomenon is rediscovery of the legend and fad of the ghost story, which is also produced from the hate of the denaturalized body, which is once again expanded and reproduced. Appearing in this environment of affect, M enacts diffraction, which is based on backlash, lacking posthuman implications for the materialization of the techno-body. M puts humanistic assumptions about "Man" as a universal definition, historically framed and defined in context. But it is not universal and it is gendered. The current time when the political turmoil surrounding medical technology, discourse, and bodily matters is violently intra-acted is the time to carefully account and respond to the alternative definitions of human beings that M has rejected.

• Journal of the Institute of Convergence Signal Processing
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• v.10 no.1
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• pp.80-85
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• 2009

The performance of the robot is very limited in the conventional model-based control methods when the environments around a robot are not structured or are varying dynamically. The reason for that is the methods are based on the model of the environments which is very difficult to match with the real environments and on a path planning which is complex and time-consuming. On the other hand, the behavior-based control methods are not dependant on the model of the environments nor a complex planning. In those methods, a specific behavior is coupled with a specific sensor output, so the response of a robot is quite reactive and timely in dynamic and unstructured environments. In this thesis, we propose a situation dependant behavior based control architecture, in which a robot may behave differently to the same sensor output depending on various situations. We also show some experimental results to show the feasibility of the proposed control architecture.