• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.4
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• pp.782-791
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• 2005

In this paper, path planning and tracking problems are mentioned to guarantee efficient and safe navigation of autonomous mobile robots. We focus on the path planning and also deal with the path tracking and obstacle avoidance. We improved the conventional distance transform (DT) algorithm for the path planning. Using the improved DT algorithm, we obtain paths with shorter distances compared to the conventional DT algorithm. In the stage of the Path tracking, we employ the fuzzy logic controller to conduct the path tracking behavior and obstacle avoidance behavior. Through computer simulation studies, we show the effectiveness of the Nosed navigational algorithm for autonomous mobile robots.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.5
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• pp.1034-1042
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• 2009

The study revisits Miles and Snow's strategy typology to investigate the performance relationship with the strategic behavior. Where the most strategy typology researches discern the typology by the respondent's survey such as choosing the best representative behavior for the organization, we developed the strategic typology by the organization's behavior such as marketing strategy, research and development strategy and members' attitudes to the quality. The financial crisis in Korea has reestablished organizational behavior. The study emphasized the changing attitudes of strategy. The results demonstrate that prospector organizations outperform other strategic behavior organizations.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.591-594
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• 2013

This study examines how OTT service changes the television viewing experience, what are the underlying dimensions that difference of viewing behavior and experiences between OTT service and old television media. The result showed the characteristic of viewing experiences through OTT service that social viewing, channel zapping by sharing information, multi viewing, de-contextualized viewing space. Specifically, television as a family media turned into a personalized media, social viewing generalized so called 'lean forward' with each other using texts and images at the same time. In particular, information on the content and appraisal shared with each other on SNS in real time.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.295-299
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• 2005

In this paper, path planning and tracking problems are mentioned to guarantee efficient and safe navigation of autonomous mobile robots. We focus on the path planning and also deal with the path tracking and obstacle avoidance. We improved the conventional distance transform (DT) algorithm for the path planning. Using the improved DT algorithm, we obtain paths with shorter distances compared to the conventional DT algorithm. In the stage of the path tracking, we employ the fuzzy logic controller to conduct the path tracking behavior and obstacle avoidance behavior. Through computer simulation studies, we show the effectiveness of the proposed navigational algorithm for autonomous mobile robots.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.14 no.5
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• pp.69-78
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• 2004

The change of attack techniques paradigm was begun by fast extension of the latest Internet and new attack form appearing. But, Most intrusion detection systems detect only known attack type as IDS is doing based on misuse detection, and active correspondence is difficult in new attack. Therefore, to heighten detection rate for new attack pattern, the experiments to apply various techniques of anomaly detection are appearing. In this paper, we propose an behavior profiling method using Bayesian framework based on graphics from audit data and visualize behavior profile to detect/analyze anomaly behavior. We achieve simulation to translate host/network audit data into BF-XML which is behavior profile of semi-structured data type for anomaly detection and to visualize BF-XML as SVG.

• Korean journal of communication and information
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• v.67
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• pp.62-87
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• 2014

The purpose of this study is to understand the social and cultural implication of the activities of taking 'selfies' and the use of Social Network Service(SNS)s through the personal story of a 20s female researcher. She analyzes her own digital photography activities based on the experience of the use of Cyworld photo albums for three years and the use of pictures in iPhone album for fifteen months. The other researcher(40s male) cooperates to answer the questions about how to understand the digital photography activities. We understand the digital photography activities including digital cameras, social network services and smart phones as acts of personal identity configuration and acts of making the personal documentary. As a result, digital photos are used more for archive purpose rather than for document purpose. Also, we found that the digital photography activities can be understood as the interactions between human and non-human actors in the perspective of Actor-Network Theory (ANT).

• Korean Journal of Health Education and Promotion
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• v.12 no.2
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• pp.139-145
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• 1995

본 연구의 목적은 알코올 문제의 현황을 파악하고 효과적인 음주교육 방안을 모색하기 위한 것이다. 사회문화적 행위로서의 음주행동의 특징을 파악하고 음주로 인한 위해가 우리에게 미치는 영향을 파악하기 위한 것이다. 음주행동은 한 사람이 속한 사회의 문화와 관습이 허용하는 범위에 따라 그 사회가 공유하는 음주에 대한 태도나 가치의 영향을 받아 학습을 통해 습득하게 된다. 음주는 사망률, 이환율, 유산율, 범죄율 등에 막대한 영향을 끼치고 있으며 이로 인한 사회적 비용과 생명손실은 엄청난 것이다. 매스미디어를 통한 음주교육은 다른법적 제재와 병행될 때 효과적이다. 음주연령이나 세금부과 등을 통해 음주행위를 통제하는 것이 가능하다. 음주교육의 주기능은 법령과 처벌에 대한 두려움(perceived fear)를 높이는 것이다. 음주행위에 관용적인 사회 분위기를 변화시키는 것이 법령이나 처벌보다 더 효과적이다. 과도한 음주행위에 대한 비판적인 사회적 분위기와 같은 비공식적인 사회적인 제재가 음주문제의 예방에 더욱 중요하다. 청소년의 음주행위는 부모와 동료집단과의 관계에 의해 크게 영향을 받기 때문에 부모와 동료집단의 참여하에 객관적인 태도를 통해 자율적인 결정을 할 수 있도록 유도해야 한다. 음주교육에 대해 지식과 경험을 갖춘 교사가 교육을 실시하여야 하며 소그룹 활동을 통해 음주문제에 대한 이해와 바람직한 태도를 습득하게 하고 동료집단의 압력을 거부할 수 있는 능력을 키우는 것이 필요하다. 교사는 편견이 없는 객관적인 태도를 갖추어야 하고 최종적 결정은 지식에 근거하여 청소년이 하도록 하여야 한다. 음주는 가정불화, 좌절감, 실업, 이혼 둥의 부정적 감정과 연관되어 있으며 깊은 인간관계를 통한 상담이 효과적이다. 단주친목과 같은 자발적인 민간단체는 알코올 문제를 가진 사람들이 서로 모여 친목하는 가운데 도움과 치료를 받을 수 있다는 점에서 매우 효과적이다. 이러한 단체의 활용이 더욱 확대되어야 한다. 병원에서의 음주교육은 노조의 참여하에 전문적인 의료인들에 의해 이루어져야 한다. 이전에 알코올중독에서 회복된 사람을 동료교육가(peer educator)로 활용하는 것도 효율적인 교육방법중의 하나이다. 의과대학의 교과과정에 음주교육에 대한 내용을 더욱 확대하여야 한다. 음주교육은 음주라는 행위의 저변에 깔린 문화적 심리적 요인에 대한 깊은 이해를 토대로 계획되고 실시되어야 한다. 음주교육은 지역사회 전체의 참여를 통해 부모, 학생, 정부, 민간단체, 매스미디어의 공동참여를 통한 다각적인 접근이 요구된다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.38 no.3
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• pp.24-40
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• 2001

The design and implementation of agents is an essential part of the development of immersive types of tutoring systems using virtual reality. This paper proposes several effective mechanisms for the design and implementation of agents. Unlike existing researches we focus on accommodating diversity of agents' behavior in the proposed mechanisms. First, we define the space object based on the field theory. The introduction of the field theory allows us to approach the space objects in a structural manner rather than by their classification. We can also achieve dynamic genesis and extinction of the space objects, and derivation of overall changes in spatio-temporal situations. Second, we classify the behavior of agents into composite behaviors and primitive actions in order to achieve its dynamic planning. Finally, we distribute the knowledge among agents and their associated objects according to their interrelations. By this distribution, we can handle the otherwise prohibitively large amount of knowledge related to agents' behaviors and construct a dynamic environment. By implementing a situation with agent's navigation across a composite space object, we demonstrate the effectiveness of these schemes presented above.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.4
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• pp.17-22
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• 2020

Behavior-based authentication technology, which is currently being researched a lot, requires a long extraction of a lot of data to increase the recognition rate of authentication compared to other authentication technologies. This paper uses the touch sensor and the gyroscope embedded in the smartphone in the Android environment to measure five times to the user to use only the minimum data that is essential among the behavior feature data used in the behavior-based authentication study. By requesting, a total of six behavior feature data were collected by touching the five touch screen, and the mean value was calculated from the changes in data during the next touch measurement to measure the cosine similarity between the value and the measured value. After generating the allowable range of cosine similarity by performing, we propose a user behavior based authentication method that compares the cosine similarity value of the authentication attempt data. Through this paper, we succeeded in demonstrating high performance from the first EER of 37.6% to the final EER of 1.9% by adjusting the threshold applied to the cosine similarity authentication range even in a small number of feature data and experimenter environments.

• Journal of the Korean Society for Library and Information Science
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• v.56 no.1
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• pp.27-45
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• 2022

Despite the increase in the number of international students residing in Korea, there is lack of research on their Everyday Information Seeking behaviors. This study investigated the information needs and information seeking behaviors of international students in Korea according to the settlement stages (before entry, initial settlement, and present) through Critical Incident Technology (CIT). International students in Korea reported their daily life-related information needs more frequently than their academic-related information needs. International students used multiple information sources for seeking information, such as websites, social media, and friends. Compared to websites, international students demonstrated higher satisfaction with interactive sources such as social media and friends. It was found that the language barrier is the biggest difficulty that international students experience during the information seeking process. Unfamiliarity with Korean society and culture were addressed as another difficulty. Based on the understanding of international students' information needs and seeking behaviors throughout the settlement stages, recommendations for helping international students search for information in their daily life were discussed.