• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.4 s.346
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• pp.22-30
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• 2006

In this paper, the goal of our proposed algorithm is to reduce link -failure and route failure caused by dead nodes which consume all of the battery life. I propose an algorithm which provides a ability of changing mutes to neighbor nodes before some of intermediate nodes be shutting don to get the stable route maintenance. To achieve this goal, The proposed routing algerian uses additional new messages to check energy status for monitoring energy of neighbor nodes and to change the path to a neighbor node. From extensive simulations, results show that possibility of cut-offs and time-delay cause of packet-loss have been decreased and also the improvement of transmission effectiveness.

• Journal of the Korean Data and Information Science Society
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• v.20 no.2
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• pp.387-399
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• 2009

Mobile wireless networks continue to be plagued by theft of identify and intrusion. Both problems can be addressed in two different ways, either by misuse detection or anomaly-based detection. In this paper, we propose a dissimilarity-based anomaly detection method which can effectively identify abnormal behavior such as mobility patterns of mobile wireless networks. In the proposed algorithm, a normal profile is constructed from normal mobility patterns of mobile nodes in mobile wireless networks. From the constructed normal profile, a dissimilarity is computed by a weighted dissimilarity measure. If the value of the weighted dissimilarity measure is greater than the dissimilarity threshold that is a system parameter, an alert message is occurred. The performance of the proposed method is evaluated through a simulation. From the result of the simulation, we know that the proposed method is superior to the performance of other anomaly detection methods using dissimilarity measures.

• The Journal of the Korea Contents Association
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• v.6 no.9
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• pp.124-131
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• 2006

Motion graphic is also developing into its own genre in graphic design by establishing individual industrial fields. images and graphics but also recognize even motions and sounds as communication elements delivering a message. Nevertheless, web communication designers have yet to experimentally test the visual motion priniciples or the audio sound expressions in terms of technology. If the dance are used, they may be new communication approaches in the age of multi-media, which allows for communication of visual and audio information or images. With such conceptions in mind, this study was aimed at reviewing the structural relationship between visual motion principles of the kinetic and the sound images to combine the audio and video effects. To this end, the basic structure of dance and music were substituted into the dance to determine their relevancy, and thereupon, examine the effective sound expression methods and techniques depending on movements of the objects in the monitor. Thus, this study, by inquiring into the uniqueness of choreography in motion graphic, presents the possibility of limitless expression of designer creation and inner world, and the ultimate goal lies in assuring the artistic value of motion graphic and its position as a synthetic art.

• Proceedings of The Korean Society of Health Promotion Conference
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• 2009.05a
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• pp.96-96
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• 2009

본 연구는 서울시 고등학생을 대상으로 에이즈에 대한 낙관적 편견을 인구 사회적 특성에 따라 파악하고, 에이즈 지식, 에이즈에 대한 낙인 및 사회적 거리감 등의 변수, 관연도와 낙관적 편견과의 관련성을 확인함으로써 에이즈 예방교육 및 메시지 개발에 도움을 주고자 한다. 본 연구에서 조사 대상 모집단은 서울시 소재 고등학생이 대상이다. 표집은 인문계 고등학교 6개교와 실업계 고등학교 2개교를 지역별로 무작위로 추출한 후 각 학년별로 2개 반을 무작위로 뽑아 그 반을 모두 조사하는 방법을 이용하였다. 총 1537부의 설문지가 배포되어 모두 수거되었으며. 이 중 응답이 불성실한 설문지 21부를 제외한 총 1,516부(98.1%)가 분석에 사용되었다. 본 연구의 주요결과는 다음과 같다. 첫째, 에이즈 감염에 대한 낙관적 편견이 있는 것으로 나타났다. 둘째, 낙관적 편견에 대한 인구 사회적 특성을 살펴보면 여학생이 남학생 보다(p<.05), 성적이 상, 중인 학생이 하인 학생보다(p<.05) 유의하였다. 셋째, 낙관적 편견과 에이즈 지식 간에는 유의하지 않았다. 낙관적 편견과 관여도는 부의 상관관계를 보여 관여도가 클수록 낙관적 편견이 감소하는 것으로 나타났으며, 자기존중감과 자기통제감이 클수록 낙관적 편견이 큰 것으로 나타났다((r=.17, p<.01, r=.25, p<.01). 넷째, 에이즈에 관한 낙관적 편견에 미치는 영향력을 검토한 결과 성별, 성적은 낙관적 편견에 유의하지 않았으나 관여도, 자기존중감 및 자기통제감은 유의하였다($R^2$=.112, F=31.655) 결론적으로 관여도, 자기존중감, 자기통제감은 에이즈에 대한 낙관적 편견에 영향을 미치는 요인임이 확인 되었다. 이러한 결과는 청소년들을 대상으로 하는 에이즈 예방교육을 계획할 때에 단순히 정보나 지식을 전달하는 것뿐만 아니라 그들이 갖고 있는 신념과 행동을 변화시키는 여러 요인들에 대하여도 충분히 검토해 볼 필요성이 있음을 시사한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.2
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• pp.37-41
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• 2018

As individuals generate and share various content anytime and anywhere, new networking architectures, such as content-centric networking (CCN) using the content name as a packet identifier, have been in the spotlight recently. However, the current CCN hardly takes into account node mobility problems, especially the mobility of content sources. The movement of content sources causes long delivery latency and long service disruptions. To solve that, the tunneling-based redirection scheme was proposed. However, the tunneling-based scheme requires a location-update procedure whenever the network changes, which creates many control messages and causes long latency. So, this paper presents hierarchical mobility management of mobile CCN to reduce the number of control messages and handoff latency. Performance evaluation shows that the proposed scheme can provide low control overhead, which results in network scalability.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3858-3864
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• 2014

This paper proposes the smart emotion lighting control system of a mobile-based. The proposed smart emotional lighting control system to reduce the emotional lighting device, internal heat and the power consumption was configured to the android platform mobile device and zigbee module, emotional lighting device, lighting control module, power supply, and general-purpose transistor. The mobile device was to transmit the real-time control information to the emotional lighting device when connected to the system, and it was designed to control the emotion lighting device based on the control messages and status monitoring. In this paper, the efficiency verification results of the proposed smart emotional lighting control system showed that it was possible to control by emotion lighting control and the color temperature variable. The heating value and the power consumption could be reduced by21% and up to 48%, because of the controlled lighting using emotion language.

• Journal of Advanced Navigation Technology
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• v.3 no.2
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• pp.185-195
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• 1999

항공이동통신분야에서는 아날로그형 음성통신의 한계점을 극복하고, 운용자의 업무 부담을 경감할 목적으로 항공이동데이터통신망(VDL)을 이용한 데이터 통신이 항공운용통신(AOC) 분야에서 발전되었으며, 이를 항공교통서비스(ATS) 분야에 적용하기 위한 연구가 국제민간항공기구(ICAO)의 CNS/ATM 구축 권고에 의하여 미국, 유럽 등 항공 선진국에서 진행되고 있다. 본 논문은 항공교통서비스 분야에 VDL을 이용한 데이터 링크 서비스를 제공하기 위하여 디지털형의 출발전비행허가(PDC) 시스템을 개발한 내용의 결과이다. 개발된 PDC 시스템은 하나의 PC급 단일 시스템으로 항공교통관제소, VDL 통신망, 관제사 등이 원격으로 연동되어 실시간 및 동시에 PDC 정보를 처리하여야 한다. 이를 위하여 제안된 기법은 하나의 프로세서에 여러 개의 쓰레드를 갖는 멀티 쓰레드 방식이 도입되어 설계되었다. 멀티 쓰레드 방식이 사용된 이유는 시스템의 간소화, 효율적인 내부 자원의 이용, 데이터 처리에 있어서 우수한 성능을 발휘하기 때문이다. 본 논문은 김포공항 PDC 시스템의 구조 및 설계 내용을 기술하고, 실제 운용 결과에 대한 데이터를 분석하였다. 김포공항 PDC 시스템의 운용결과를 이용한 분석한 결과, 운용초기단계로 모든 항공기에 시스템이 구축되지 않아 매일 평균 25대의 항공기가 운용하여 평균 10%의 이용률을 나타내며, 최대 34대의 항공기가 이용하고 있다. 메시지 송/수신에 걸리는 시간을 분석한 결과, 항공기의 PDC 요청부터 MAS의 수신에 소요되는 시간은 최소 14초부터 최대 983초(16분 23초)까지로써, 평균 122초(2분 2초)의 시간을 나타내었다. 또한 신뢰성을 확인하기 위하여 가용도를 계산한 결과 99.7%로써 상당히 신뢰할 수 있는 수준이었다. 또한, 다중 처리를 위하여 사용된 방식인 멀티 쓰레드 방식이 적절히 동작함을 확인할 수 있었다. 앞으로, 전체 연동 시스템이 자동화로 구축될 경우, PDC의 요청부터 발송 및 확인까지 상당히 짧은 시간 내에 이루어져 관제업무 능률을 향상시킬 수 있을 것이다.

• Journal of Korea Multimedia Society
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• v.3 no.5
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• pp.516-525
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• 2000

A lot of efforts have been made to develop a new technology for efficient distance education based on a powerful Internet service like World Wide Web. By developed distance education systems, we can study something we want at anytime and anywhere. However in spite of the excellent achievements we have made, something insufficient still is remained. Distance education methods only depending on static homepages or voices and simple drawings may be insufficient to support as much effects as in real class. So it is necessary to develop a new method for teaching students more feasibly and efficiently In this paper, we try to design and implement a lecture authoring system that offers effective distance education with voices, animations, camera images, drawings and etc.. We can expect the designed system can give more efficient education effects like a face-to-face lecture in real class. The enclosed function of intense compression enables to transmit the lectures more speedily. Besides it has caption processing function to serve additional informations to students with caption texts, messages and hyperlinks.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.12 no.3
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• pp.1-10
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• 2013

Most of the current traffic signal controller use load switches to transmit high voltage power to the signal lamps. The direct transmission of high voltage power may cause a lot of problems like leakages of electric power, obstructions of pedestrian, environmental disfigurements. To overcome these problems, the development of digital type signal controller has been trying in the various methods. Digital communication between a master controller and signal lamps is the most important part to improve control performance in the digital type controller. A communication system for the digital signal controller was developed in this study. The system bases on CAN specification, includes ID structure for most peripheral devices like loops, signal lamps, push buttons, police switches. The operability of this system verified with a software based CAN simulation tool.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.3
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• pp.179-186
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• 2012

Nowadays, the multihomed host equipped with multiple network interfaces has been interested research in next generation wireless network, because the mobile users expect that they can be able to access services not only anywhere, at any time and from any network but also simultaneously. This paper addresses the mobility simulation model of the multihomed node for supporting MIPv4 and MIPv6 function in an interworking of Worldwide Interoperability for Microwave Access (WiMAX) and IEEE 802.11 WLAN. The multihomed node with two air interfaces has been developed based on WiMAX and WLAN workstation node model in simulation software. The main point of the developed model is to support both MIPv4 and MIPv6 function, and provide network selection policy for the multihomed node between WiMAX and WLAN network. Based on the received Router Advertisement along with the interface number, we can manage the access interfaces in ordered list to make handover decision while the multihomed node is moving. In the end of this paper, the simulation scenarios and results are shown for testing MIPv4 and MIPv6 function.