• Proceedings of the Korean Information Science Society Conference
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• 2010.06c
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• pp.339-344
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• 2010

오늘날 인터넷 사용자들은 블로그나 뉴스 등의 매체에서 트랙백을 사용해 자신의 의견을 보다 자유롭게 나타낸다. 그러나 이러한 자유로움을 악용해 트랙백 스팸을 유발하여 네트워크의 자원을 낭비하고 방문자들에게 잘못된 정보를 전달해 해당 포스트의 신뢰를 떨어뜨린다. 트랙백 스팸은 유명한 포스트와 연계하여 자신의 포스트로 사용자들을 유도하는 특징을 가지기 때문에 일반적인 웹 스팸을 탐지하는 기술을 적용하기 어렵다. 따라서 본 논문에서는 자신이 작성한 글이 다른 사람의 글과 관련이 있다고 생각하여 다른사람의 글에 자신의 글을 링크시키는 트랙백의 특성을 이용하여 원본 페이지와 트랙백 페이지 그리고 트랙백 페이지의 아웃링크 내용상의 유사도와 동시 출현(co-occurrence) 정보를 이용하여 트랙백 스팸을 처리하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.1307-1310
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• 2004

네트웍이 고속화 됨에 따라 대용량 데이터를 실시간으로 전송/처리/저장하는 응용 분야가 등장하고 있다. 또한 전송 지연을 감소하고 신뢰도를 향상하기 위해서 많은 스토리지(storage) replica들이 네트웍에 설치되었다. 이러한 환경에서 응용 프로그램이 요구하는 성능을 만족하기 위해서는 네트웍 자원 뿐만 아니라 종단간 자원인 저장 매체의 선택/예약/관리를 함께 고려하는 통합적 분산 네트웍 스토리지(DNS: Distributed Network Storage) 시스템이 필요하다. 이러한 DNS에서 QoS를 제공하는 기존의 방식들은 크게 데이터그램(datagram) QoS, 클래스(class)별 차등적인 서비스를 제공하는 DiffServ QoS, 그리고 각 플로우(flow) 별 개별적인 서비스를 제공하는 IntServ QoS로 세분된다. 본 논문에서는 기존에 제안된 방식들을 비교 분석하여 각각의 장단점을 기술하며 향후 연구 문제들을 살펴본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1083-1085
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• 2009

웹의 발전에 따라 정보 전달의 매체가 웹으로 이동됨에 따라 대부분의 기업이나 기관에서는 그 유용성 및 용이성 때문에 홈페이지를 통해 정보와 서비스를 제공하고 있으며 고객, 직원, 협력사 등과의 거래를 행하는 데 있어 웹 애플리케이션을 사용하는 경우가 많아졌다. 이러한 현상과 함께 웹에 대한 공격이 급증하면서 웹 공격을 필터링 하기 위한 여러 가지 방법이 제시되었다. 본 논문에서는 적은 오버헤드로 웹 서버와 브라우저의 영역에서 보다 신뢰성 있는 웹 페이지 전송을 위한 방법을 기술한다.

• 한국벤처창업학회:학술대회논문집
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• 2023.04a
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• pp.11-13
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• 2023

대기업 등을 비롯한 중소기업들은 여러 광고 매체를 이용해 자사의 상품이나 브랜드 이미지를 홍보하는 것 이외에 유튜브와 같은 온라인 동영상 서비스 플랫폼에서 제품이나 서비스를 동영상으로 제작하여 다채로운 방법으로 가공, 소개하며 마케팅 효과를 극대화하고 있다. 이는 기업의 제품 및 서비스의 동영상 마케팅이 소비자들에게 어떤 영향을 미치고 직접적인 매출과 상관관계가 있는지를 이미 파악하고 접근하고 있다는 증거이다. 상대적으로 소상공인들은 동영상의 필요성에 대한 인식이 부족한 상태이다. 이에 유튜브와 같은 온라인 동영상 서비스 플랫폼에서 효과적으로 제품 및 서비스에 대해 관심과 흥미를 불러 일으키기 위해 동영상 마케팅을 시행하고자 할 때 동영상은 어떤 요소들이 충족되어야 하는지를 연구하려고 한다. 그리고 정확하게 동영상의 어떤 요소들이 소비자들의 구매 욕구를 상승시키는지와 같은 소비자들의 구매 행동 부분에 밀접한 영향을 미치는 동영상의 요소들에 대해 연구하고자 한다. 소비자들이 느끼는 구매 의지에 영향을 미치는 동영상의 요소들을 역설적으로 소상공인들에게 영상의 필요성을 인식시키기 위함이다.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.818-825
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• 2009

Edutainment is the one of important factors to study interactive TV for children, and it is a big portion in kid's marketing and education market as well. The aim of this study is to design interactive TV for children to maximize edutainment effects by researching children's behaviors. The analysis of children's behaviors with educational effects should be focused to apply designing user experience to propose new ideas of interactive TV. Through observing children's behaviors and interaction with other media, such as books, CD players, digital camera, and so on, TV can be reanalyzed as reliable media, which is creative interactive TV for children with proposals of user experience structure and interaction solution. TV has been changed from analog TV to IPTV and it will be different with network and interactive solution.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.6
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• pp.151-158
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• 2010

In line with the requirement of appropriate protocol support for such mission-critical wireless sensor network (WSN) applications as patient monitoring, we investigate the framework for designing medium access control (MAC) schemes. The data traffic in medical systems comes with inherent traffic heterogeneity as well as strict requirement of reliability according to the varied extents of devise-wise criticality in separate cases. This implies that the quality-of-Service (QoS) issues are very distinctly delicate requiring specialized consideration. Besides, there are features in such systems that can be exploited during the design of a MAC scheme. In a monitoring or routine surveillance application, there are degrees of regularity or predictability in traffic as coordinated from a node of central control. The coordinator thus takes on the role of marshaling the resources in a neighborhood of nodes deployed mostly for upstream traffic; in a collision-free scheme, it schedules the time slots for each superframe based on the QoS specifications. In this preliminary study, we identify the key artifacts of such a MAC scheme. We also present basic performance issues like the impact of superframe length on delay incurred, energy efficiency achieved in the network operation as obtained in a typical simulation setup based on this framework.

• Journal of KIISE:Computer Systems and Theory
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• v.27 no.6
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• pp.567-582
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• 2000

We propose a new way of managing flash memory space for flash memory-specific file system based on log-structured file system. Flash memory has attractive features such as non-volatility, and fast I/O speed, but it also suffers from inability to update in place and limited usage cycles. These drawbacks require many changes to conventional storage (file) management techniques. Our focus is on lowering cleaning cost and evenly utilizing flash memory cells while maintaining a balance between the two often-conflicting goals. The proposed cleaning method performs well especially when storage utilization and the degree of locality are high. The cleaning efficiency is enhanced by dynamically separating cold data and non-cold data. The second goal, cycle-leveling is achieved to the degree where the maximum difference between erase cycles is below the error range of the hardware. Simulation results show that the proposed method has significant benefit over naxve methods: maximum of 35% reduction in cleaning cost with even spreading writes across segments.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.5B
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• pp.463-468
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• 2009

In VANET(Vheicle Ad hoc Network), the researches based on the wireless LAN are conducting and the method based on 802.11a is being adapted in IEEE 802.11p WAVE(Wireless Access in Vehicular Environments). However, wireless LAN which uses a single channel in a competition can cause transmission delays because of a frequent collision and a use of CSMA/CA to avoid competition in VANET requiring a fast access. In this paper, we designed CMMP (Clustering based Multi-channel MAC protocol) adequate to VANET and then confirmed the appropriate channel conditions in a V2V communication on the basis of this protocol. The simulation results showed that a packet collision and a transmission delay by the use of an existing single channel based on the contention decreased more than 60% by CMMP.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.8
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• pp.1877-1884
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• 2014

Because of the limited power resource, we need a reliable low-power media access control technique suitable for unmaned remote sensor operation condition for the unmanned sensor processor to perform the task in the remote wireless network situation. Therefore CSMA/CA and X-MAC is generally considered to effectively transmit the signal in the low-power wireless network. In this paper, we propose the more efficient low-power LP-MAC Technique which consumes the minimum power and transmits the data faster in condition that the mobile nodes' joining to and leaving from the network which consists of the fixed nodes is fluid. The fixed nodes operate in an asynchronous mode to perform the network self-configuration and transmit data faster to the mobile node which is frequently join and leave the network. When the mobile node leaves the network, the network's operation mode will be synchronous mode to achieve the minimum power consumption, thus the minimum power operation becomes possible.

• The Journal of the Korea Contents Association
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• v.15 no.3
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• pp.78-87
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• 2015

Recently, Police integrity has been issued on the media, which cause discredit of police organization. Although high level of morality and integrity are required compared to other occupational groups due to their authority to exert legal force to the citizens and a variety of policies have been enforced by the National Police Agency for the purpose of uplifting the integrity of the officers, in reality, corruption had not yet been eradicated. At this point in time, this study attempted to draw implications for uplifting integrity by utilizing domestic and foreign preceding studies and statistical data related to police corruption and uplifting integrity. The inspection system through whistle-blowing was pointed out as a problem in the institutional framework that hinders uplifting integrity of the police officers and the perception in which police officers are regarded as potential criminals was also pointed out as a problem. Also, vague standards of disciplinary action in examining an offense of a police officer and lack of care for those who were disciplined in the past which affects loyalty to the organization were presented as problems. Based on such suggested concerns, policies for uplifting integrity and restoring citizens' trust in the policies officers were proposed. The proposed agenda were warning the police officers by presenting clear and specific category of corruptive behaviors, expressing the necessity of devising a system that prevents the officers from committing serious crimes by discovering problematic officers earlier through introduction of Early Warning System(EWS) of US and Australian police in order to break away from exposure-oriented inspection system, and reinforcing the testing of integrity in the new employment process.