• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.6
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• pp.1476-1481
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• 2010

Cyber education community in the digital era is going on across all areas of knowledge accumulation rate of acceleration of the demand for retraining and lifelong learning can effectively accommodate. Therefore, new teaching methods in the future as consumer-driven 21st century is expected to settle into the main education system. However, to properly interact with people due to lack of feedback delay, reading and writing intensive courses is detrimental to the environment caused by a particular student, and Computer skills are based on computer-related technology to disadvantage poor students, and many have problems. In this paper, recent university education and cyber education requires a paradigm shift is required in an environment that factors affecting students' satisfaction were evaluated, and Improvement of cyber education will be studied.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.405-408
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• 2010

Cyber education community in the digital age is going on across all areas of knowledge accumulation rate of acceleration of the demand for retraining and lifelong learning can effectively accommodate. Therefore, new teaching methods in the future as consumer-driven 21st century is expected to settle into the main education system. However, to properly interact with people due to lack of feedback delay, reading and writing intensive courses is detrimental to the environment caused by a particular student, and Computer skills are based on computer-related technology to disadvantage poor students, and many have problems. In this paper, recent university education and cyber education requires a paradigm shift is required in an environment that factors affecting students' satisfaction were evaluated, and Improvement of cyber education will be studied.

• Construction Engineering and Management
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• v.23 no.3
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• pp.4-9
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• 2022

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.671-673
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• 2000

현실세계에서 사이버 세계로의 전환은 우리에게 많은 생활의 변화를 가져옴과 동시에 혼란을 동반 하고 있다. 이러한 상황에서 암호기술은 사이버 세계의 질서를 잡는 핵심기술로 발전하고 있다. 본 논문에서는 기존의 공개키 기반 구조의 단점들을 보안 하는 방법으로 생체인증 기술인 지문 인식시스템과 RSA암호 알고리즘을 결합한 새로운 인증 시스템을 제안한다.

• Journal of the Korea Computer Graphics Society
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• v.25 no.1
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• pp.23-32
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• 2019

Cybersickness is a symptom of dizziness that occurs while experiencing Virtual Reality (VR) technology and it is presumed to occur mainly by crosstalk between the sensory and cognitive systems. However, since the sensory and cognitive systems cannot be measured objectively, it is difficult to measure cybersickness. Therefore, methodologies for measuring cybersickness have been studied in various ways. Traditional studies have collected answers to questionnaires or analyzed EEG data using machine learning algorithms. However, the system relying on the questionnaires lacks objectivity, and it is difficult to obtain highly accurate measurements with the machine learning algorithms. In this work, we apply Deep Neural Network (DNN) deep learning algorithm for objective cybersickness measurement from EEG data. We also propose a data preprocessing for learning and network structures allowing us to achieve high performance when learning EEG data with the deep learning algorithms. Our approach provides cybersickness measurement with an accuracy up to 98.88%. Besides, we analyze video characteristics where cybersickness occurs by examining the video segments causing cybersickness in the experiments. We discover that cybersickness happens even in unusually persistent changes in the darkness such as the light in a room keeps switching on and off.

• Journal of Advanced Navigation Technology
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• v.21 no.6
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• pp.633-637
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• 2017

Cyber attacks on aircraft and aeronautical networks are not much different from cyber attacks commonly found in the ground industry. Air traffic management infrastructure is being transformed into a digital infrastructure to secure air traffic. A wide variety of communication environments, information and communications, navigation, surveillance and inflight entertainment systems are increasingly threatening the threat posed by cyber terrorism threats. The emergence of unmanned aircraft systems also poses an uncontrollable risk with cyber terrorism. We have analyzed cyber security standards and response strategies in developed countries by recognizing the vulnerability of cyber threats to aircraft systems and aviation infrastructure in next generation data network systems. We discussed comprehensive measures for cybersecurity policies to consider in the domestic aviation environment, and discussed the concept of security environment and quick response strategies.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.304-306
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• 1999

사이버 강의 스크립트를 정의하고, 이 스크립트의 문법을 etf(Ewha Tag Format)라 명칭하였다. 그리고 사이버 강의 스크립트를 자바 웹 서버 상에서 효과적으로 처리할 수 있도록 자바 웹 서버를 설계 구현하였다. 사이버 강의 스크립트란 강의록, 문제출제, 문제 평가, 숙제 제출, 자료실, 토론방 등의 가상대학 환경을 편리하게 구축하기 위해서 데이터베이스 및 파일의 접근을 웹 환경의 스크립트만을 사용하여 구현할 수 있도록 정의한 것이다. 강의 시스템은 사용자에게 정형화된 포맷이 많이 쓰이기 때문에 스크립트로 정형화된 형태의 인터페이스가 적합하며, 실제적인 구현이 자바로 이루어지기 때문에 확장의 범위가 크다. 웹 서버는 이러한 etf 스크립트를 사용자에게 제공하기 위한 스크립트 엔진을 포함하고 있어야 하는데, 이러한 스크립트 엔진이 웹 서버와 어떻게 상호작용 하는가에 따라 성능이 좌우된다. 상호 작용하는 방법에는 스크립트 엔진이 웹 서버 자체에 포함된 경우, 스크립트 엔진을 수행하는 독립적인 프로세스를 띄워서 스크립트를 처리하는 방법, 스크립트 엔진만을 포함하여 처리하는 별도의 서버를 두어 처리를 전환하는 방법이 있다. 따라서 본 논문에서는 자바 웹 서버 상에서 엔진을 여러방법으로 연동하고 성능을 비교하여 보다 효과적인 처리 방안을 제안하고자 한다.

• Journal of Broadcast Engineering
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• v.27 no.5
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• pp.629-637
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• 2022

This study is an experiment on the use of RDW(Redirected Walking) technology, which helps users to hardly feel the difference of user movement in the limited physical space and the extended virtual space when the user moves while wearing the HMD in the real world. The RDW function installed in 3D space realization software such as Unity3D is used to induce the user's redirection by slightly distorting the virtual space according to the user's point of view. However, if the RDW distortion rate is used excessively, dissonance is highly likely to occur. In particular, it is easy to make errors that cause cybersickness of users. It is important to obtain the RDW data value in the virtual environment so that the user does not feel fatigue and cybersickness even after wearing the HMD for a long time. In this experiment, it was tested whether the user's RDW was safely implemented, and item and obstacle arrangement data were obtained through this experiment. The RDW data obtained as a result of the experiment were used for item placement and obstacle placement in the virtual space.

• Korean Security Journal
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• no.46
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• pp.189-216
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• 2016

In March 2015, the North Korean UAVs (Unmanned Aerial Vehicles) were found and countries around the world have actively developed UAVs. UAVs or Drone have become commercialized and more civilians use UAVs for leisure. The positive possibilities of UAV use expand. However, there could be the negative sides of UAV use. The UAVs could be used for the purpose of various crime, cybercrime, and terrorism. For instance, hacking devices attached drone could be infiltrated into the sensitive networks to steal personal informations and public data. This could be a new dimension of cybercrime. As the number of internet users and cyberspace rapidly expands, problems of crimes could be worsened both quantitatively and qualitatively. By contrast, defensive measures against such threats are limited. Especially, the Korean society is vulnerable despite its well-advanced internet and computer network technology. This article investigates the current UAV types and its developments, discusses various possibilites of UAV-related crime, cybercrime, and terrorism, and proposes responses.

• The Journal of the Korea Contents Association
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• v.2 no.4
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• pp.17-22
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• 2002

This enable system integration for efficient data processing by interconnecting ASP and SQL, on-line consultation between patient and Korean medicine doctor, and semi-eternal use of medical examination data owing to storage and check of medical examination data(accurate medical examination and description using this medical examination data between patient and Korean medicine doctor). This is a Korean medicine remote examination system which converts from existing Korean medicine hospital system being maintained as existing off-line only to medical examination type of both on-line and off-line mode transcending time and space on web in which anyone can participate.