• Journal of Navigation and Port Research
• /
• v.33 no.8
• /
• pp.539-548
• /
• 2009

This work aims to highlight the importance and role of the theme and message of BIE exhibitions in the 21th century, and to suggest essential points concerning the preparation of the Expo 2012 Yeosu which would focus on the theme and urban development. After the Expo '98 Lisbon, the theme and message of Expo has been changed from focusing on the progress of technology itself to rethinking of progress itself and focusing on the future of the globe. This change also reflects the need to solve the problems of global environment problem in today's human society and to pursue the new technology which enable to make sure sustainable development. Because the Expo Yeosu, whose theme is the sea and coast, is compared to case of Expo Lisbon whose theme is ocean, we need to make a benchmarking the case of the Expo Lisbon and to make efforts to differenciate the case of the Expo Lisbon. This article suggests concerning the theme and urban development plan of the Expo Yeosu as follows: First, to propose current and future cutting edge technology to utilize the resources of the ocean and the coast and to propose the Yeosu Project, a capacity-building program designed to address various challenges confronting developing countries. Second, to propose a different urban redevelopment plan of capital Lisbon, ie to propose sea port cities network to link the advent of the Namhaeansidae.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.21 no.10
• /
• pp.1840-1848
• /
• 2017

Linear wireless sensor networks typically construct a network topology with a high reliability through sequential 1:1 mapping among sensor nodes, so that they are used in various surveillance applications of major national infrastructures. Most existing techniques for identifying sensor nodes in those networks are using GPS, AOA, and RSSI mechanisms. However, GPS or AOA based node identification techniques affect the size or production cost of the nodes so that it is not easy to construct practical sensor networks. RSSI based techniques may have a high deviation regrading location identification according to propagation environments and equipment quality so that complexity of error correction algorithm may increase. We propose a timestamps based sequential localization algorithm that uses transmit and receive timestamps in a message between sensor nodes without using GPS, AOA, and RSSI techniques. The algorithms for distance measurement between each node are expected to measure distance within up to 1 meter in case of an crystal oscillator of 300MHz or more.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.21 no.5
• /
• pp.71-82
• /
• 2011

The RFID system provides undeniable advantages so that it is used for various application. However recent RFID system is vulnerable to some attacks as eavesdropping, replay attack, message hijacking, and tag tampering, because the messages are transmitted through the wireless channel and the tags are cheap. Above attacks cause the tag and reader impersonation, denial of service by invalidating tag, and the location tracking concerning bearer of tags, A lot of RFID authentication protocol bas been proposed to solve the vulnerability. Since Weis, Sanna, Rivest, and Engel, proposed the bash-based RFID authentication protocol, many researchers have improved hash-based authentication protocol and recent bash-based authentication protocols provide security and desirable privacy. However, it remains open problem to reduce the tag identification time as long as privacy and security are still guaranteed. Here we propose a new protocol in which the tags generate the message depending on the state of previous communitions between tag and reader. In consequence, our protocol allows a server to identify a tag in a reasonable amount of time while ensuring security and privacy, To be specific, we reduced the time for the server to identify a tag when the last session finished abnormally by at least 50% compared with other bash-based schemes that ensure levels of security and privacy similar to ours.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2007.10a
• /
• pp.585-588
• /
• 2007

With several enhanced access technologies, users have many changes to select their preference access network. There are great differences between access technologies, users' need to handover from one access network to another is getting bigger. As users' need grows there are several works to archive fast handover between heterogeneous and homogeneous access networks. However traditional handover mechanisms work only on L2 or L3 have several limits that prevent fast and heterogeneous handover. To overcome those limits, IEEE 802.21 WG and IRTF MOBOPTS RG are working for developing handover mechanisms that uses L2 information on theupper layers like L3. This paper introduces two new L2 information and properties can be used to archive fast handover of mobile nodes.

• Broadcasting and Media Magazine
• /
• v.25 no.1
• /
• pp.83-99
• /
• 2020

본 연구는 '인공지능이 그린 그림은 예술적 가치가 있는가?' '인공지능을 활용한 21세기의 현시대 예술은 무엇인가?' '어떻게 실현되는가?'라는 실천적 질문에서 출발하였다. 4차 산업혁명은 초실감(Hyper-Reality), 초지능(Hyper-Intellect), 초연결(Hyper-connect)로 '초(Hyper)의 시대'를 예고하고 있다. 이 혁명은 현시대 예술가에게 현실과 가상을 분간할 수 없는 혼합현실환경, 예술의 창작활동에 훌륭한 조수로서 역할을 할 수 있는 인공지능, 예술적 경험을 가상과 현실을 넘나들며, 언제 어디서나 즉각적으로 체험할 수 있는 기술을 제공한다. 실천적 질문에 대한 해답을 찾기 위하여 주관기관 홍익대학교, 참여기관 서울미디어대학원대학교, (주)브이알애드가 2018년 5월부터 2019년 12월까지 2년간 진행한 한국콘텐츠진흥원 문화기술 연구개발 지원사업 '인공지능 기반 창작 아틀리에 발굴 및 구축 기술 개발 프로젝트'를 통하여 인공지능 엔진(stNET, vidNET, hdtNET, omniNET)을 개발하였고 예술가와 4번의 전시를 통하여 성능 및 가치를 실증하였다. 인공지능은 그동안의 예술적 장르와는 차별화된 특이점을 가지고 있으며 응용 범위 또한 다양하다. 현시대 예술가에게 새로운 장르 개척의 훌륭한 조수로서 역할이 가능하다는 것이다. 그동안 현대 예술의 조형과 개념 미술에 한정적 메시지를 넘어, 인공지능기반 초 실감, 실 시간, 직관적 인터랙션을 통하여 직접적 예술 경험을 체험할 수 있다는 점에서, 현시대의 예술가에게 초 경험 예술(Hyper-Experience Art)의 시작인 동시에 새로운 장르 개척의 단초가 제공된다.

• The Journal of the Korea Contents Association
• /
• v.8 no.1
• /
• pp.356-366
• /
• 2008

In the past, design used to be known as graphic design for printing medium. However, these days, through video media or multimedia, it has expanded to convey information thanks to the innovative development of the computer, which is digital civilization. Now design, through elaborate plans and projects, is acknowledged as creative work for communications appealing to emotion comprehensively and to transmit information effectively. This thesis presented a new methodology of mess communication using various elements such as video typography. Furthermore, reflecting feedback from hearing-unpaired people, theological background well grounded and the way to proceed in the future were also addressed.

• Journal of Information Technology Applications and Management
• /
• v.23 no.1
• /
• pp.97-117
• /
• 2016

Drawing on the theoretical framework of customer value-satisfaction-loyalty, this study examines how scarcity message influences customers' value, satisfaction, and loyalty in the context of group-buying social commerce. Previous studies have argued that scarcity message limiting the avilability of products and service is a source of enhancing customer value. In this regard, this study posits scarcity message as a predictor of customer value. Furthermore, this study classifies customer value into two forms (i.e., utilitarian value and hedonic value) and verfies how scarcity message is associated with them. To test the proposed research model and hypotheses, this study performed structural equation modeling (SEM) analyses, using a total of 292 data collected on users who have experience in purchasing products and service through group-buying social commerce sites such as Coupang, Timon, and WeMakePrice. The key results are as follows : First, scarcity message increases utilitarian and hedonic values and further customer satisfaction. Second, utilitarian value increases customer satisfaction and repurchase intention while hedonic value has nothing to do with them. The findings imply that customers seek to maximize utilitarian value through group-buying social commerce. Finally, this study indicates that repuchase intention depends greatly on customer satisfaction.

• Electronics and Telecommunications Trends
• /
• v.30 no.1
• /
• pp.94-101
• /
• 2015

이동통신 기반 IoT(Internet of Things) 관련 표준들은 3GPP와 ETSI를 중심으로 제정되어 왔으나 2012년부터 표준의 중복을 회피하고 단일화된 표준을 통해서 IoT 시장을 성장시키고자 oneM2M이라는 국제적 협의체가 구성되었으며, 최근 Release 1 표준을 발표하는 등 IoT 표준을 사실상 주도하고 있다. Mason과 Machina 리서치에 따르면 2020년에는 동시 연결된 M2M(Machine to Machine)/IoT 장치들의 수가 21억개에 달할 것이고, 이것들이 동시에 200억개의 통신 연결을 생성할 것이다. 이런 수많은 장치들을 관리하기 위한 표준으로 OMA(Open Mobile Alliance)에서는 LWM2M(Lightweight M2M)를 제정하였다. 또한 이런 장치들은 센서들과 같이 연산능력과 배터리에 제약이 많아서 이것을 극복할 수 있는 메시지 프로토콜로 IETF에서는 CoAP 표준을 제정하였다. oneM2M에서도 CoAP과 LWM2M 표준을 채택하였고, 이를 기반으로 한 단말과 응용서비스 관리 기능이 확대될 것으로 기대된다. 본고에서는 이동통신 기반 IoT 표준 동향과 LWM2M 기반 단말 관리 규격에 대해 살펴본다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.06b
• /
• pp.21-26
• /
• 2007

HITSP(Healthcare Information Technology Standards Panel)은 헬스 케어 관련 산업의 상호 운용성을 위해 일반적으로 수용되고 유용한 표준들을 선별하여 표준 세트를 제공하는 것을 목적으로 한다. HITSP에서는 평생전자건강진료정보(EHR, Electronic Health Record)의 활성화를 위해 첫 번째 해결해야 할 영역으로 검사실 결과 정보 교류를 정하였다. 이에 본 논문에서는 검사실 결과 정보 교류를 위한 방법으로 HITSP에서 제시하는 HL7 버전 2.x 메시지와 CDA 방법 중 인증(authentication) 처리가 가능하고 영속성(persistence)이 있는 CDA 방법을 선택하였다. 또한 CDA를 작성하고 처리하는 방법을 제시하고, 더 나아가 평생전자건강진료정보(EHR)를 위해 CDA를 적용하여 검사실 결과 정보를 교류하여 보았다. 이에 병원과 EHR 시스템의 상호 운용성이 높아져 진료 과정의 효율성을 높일 수 있었고 환자와 의료진에게 양질의 검사 결과 정보를 제공할 수 있었다.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.46 no.6
• /
• pp.37-47
• /
• 2009

In this paper fast mobile multicast handover mechanism based on IEEE 802.21 MIH (Media Independent Handover) is proposed. We solve long multicast handover delay time caused by L3 movement detection mechanism of the existing mobile multicast methods. The proposed architecture adopts multicast manager concept to MIH framework in order to efficiently perform mobile multicast handover, and adds the new MIH messages dedicated for mobile multicast. Since multicast channel zapping operations of mobile users effectively make a mobile terminal handover, the architecture should consider the situations. Multicast network selection algorithm is designed by means of terminal speed and fair selection algorithm named AHP/GRA. Finally the performance of the proposed architecture against the legacy mobile multicast mechanisms is evaluated in terms of signaling cost and multicast handover delay time.