• Journal of the Korean Society for information Management
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• v.31 no.4
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• pp.161-178
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• 2014

Recently, many information services allow users to collaborate to produce and use information. Sharing information is also important for users who have similar taste or interest. As various channels are available for users to share their experiences and knowledge, users' data have also been accumulated within the information services. This study collected movie lists made by users of IMDB service. Co-word analysis and ego-centered network analysis were adapted to discover relevant information for users who chose a specific movie. Three factors of movies including movie title, director and genre were used to present related movie information. Movie title is an effective feature to present related movies with various aspects such as theme or characters and the popularity of directors affects on identifying related directors. Genre is not useful to find related movies due to the complexity in the topic of a movie.

• Journal of the Korea Society of Computer and Information
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• v.14 no.5
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• pp.65-75
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• 2009

The development of IT technology, Internet popularity is increasing geometrically. However, as its side effect, the intrusion behaviors such as information leakage for key system and infringement of computation network etc are also increasing fast. The attack traffic detection method which is suggested in this study utilizes the Snort, traditional NIDS, filters the packet with false positive among the detected attack traffics using Nmap information. Then, it performs the secondary filtering using nessus vulnerability information and finally performs correlation analysis considering appropriateness of management system, severity of signature and security hole so that it could reduce false positive alarm message as well as minimize the errors from false positive and as a result, it raised the overall attack detection results.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.6
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• pp.558-564
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• 2013

Wireless sensor networks (WSNs) contain limited energy resources and are left in open environments. Since these sensor nodes are self-operated, attacks such as sinkhole attacks are possible as they can be compromised by an adversary. The sinkhole attack may cause to change initially constructed routing paths, and capture of significant information at the compromised node. A localized encryption and authentication protocol (LEAP) has been proposed to authenticate packets and node states by using four types of keys against the sinkhole attack. Even though this novel approach can securely transmits the packets to a base station, the packets are forwarded along the constructed paths without checking the next hop node states. In this paper, we propose the next hop node selection method to cater this problem. Our proposed method evaluates the next hop node considering three factors (i.e., remaining energy level, number of shared keys, and number of filtered false packets). When the suitability criterion for next hop node selection is satisfied against a fix threshold value, the packet is forwarded to the next hop node. We aim to enhance energy efficiency and a detour of attacked areas to be effectively selected Experimental results demonstrate validity of the proposed method with up to 6% energy saving against the sinkhole attack as compared to the LEAP.

• Journal of the Korea Society of Computer and Information
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• v.16 no.8
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• pp.1-10
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• 2011

Recently, cloud computing which has provided enabling convenience that users can connect from anywhere and user friendly environment that offers on-demand network access to a shared pool of configurable computing resources such as smart-phones, net-books and PDA etc, is to be watched as a service that leads the digital revolution. Now, when business practices between departments being integrated through a cooperating system such as cloud computing, data streaming between departments is getting enormous and then it is inevitably necessary to find the solution that person in charge and find data they need. In previous studies the clustering simplifies the search process, but in this paper, it applies Hash Function to remove the de-duplicates in large amount of data in business firms. Also, it applies Bayesian Network of data mining for classifying the respect data and presents handling cloud computing based data. This system features improved search performance as well as the results Compared with conventional methods and CPU, Network Bandwidth Usage in such an efficient system performance is achieved.

• Journal of Digital Convergence
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• v.13 no.5
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• pp.245-250
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• 2015

The P2P technology is becoming a technology for receiving a service, such as the latest YouTube and Facebook. P2P technology can be easily downloaded to a large amount of multimedia content over a distributed environment. However, pictures, music, a large amount of multimedia content such as videos each user is unable to manage the content management operating smoothly because, Song communication processing overhead caused when the reception is likely to remain the problem. In this paper, we propose a convergence content management technique that provides a low communication overhead of the frequency of use of the convergence content when trying to provide a large amount of convergence content to users in a distributed environment. Our method can be used to select the appropriate frequency is high among the shared content on the P2P multimedia environments that are distributed across a frequency of use of the convergence content and provides the service. Experimental evaluation proposed method, the convergence content browsing speed than conventional techniques improved communication about 13.3% and reduced overhead to about 9.5%.

• Journal of Korea Society of Industrial Information Systems
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• v.11 no.4
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• pp.93-104
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• 2006

This paper tries to implement BOM calculation effectively by sharing the data in CAD management system and BOM systems. For this purpose, a component-based software system in this thesis was implemented by using CAD drawing systems. It can be found from this research that errors happened were reduced sharply. Especially, the BOM calculation period was cut from 2 weeks to 2days, and at the same time, the correct rate achieved 95%. Moreover, there are some following effects of our implemented system: First of all, because component development method was adopted in this paper, it makes program easy to reuse, to keep/maintenance as well as modify. Second, long-distant management is possible by using web-based development method. Third, data management is made effective by constructing image and tort database. Fourth drawing management is systemized, Finally, the system is suitable for companies.

• Journal of Korean Medical classics
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• v.22 no.2
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• pp.23-34
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• 2009

형상(形相) 망진(望診)에 대한 국제공동연구와 해외진출을 위한 준비과정으로 중의사(中醫師)를 대상으로 수요조사를 실행하였다. 참여자의 학문적인 경향성은 전통 한의학적인 보수 경향성보다는 현대의학을 실용적으로 활용하는 태도를 보였으며, 임상에서 활용도가 높은 병증체계는 장부병증과 팔강병증의 순이었다. 한방 진단법에서 중요하게 활용하는 방법은 문진(問診)이며, 망진(望診), 문진(聞診), 맥진(脈診), 복진(腹診) 등의 방법도 고른 분포도를 보였으며, 그 이유는 진단 효율성, 환자와의 상담, 치료효과 입증, 환자 정보 공유, 진단 결과의 재현성과 진단의 표준화 객관성 등으로 고르게 나타났다. 한약과 침구의 활용에 대한 진단기법의 일관성은 비교적 동일하거나 보통으로 나타났으며, 그 이유로는 한약과 침구의 변증행위가 동일한 체계를 활용하거나, 소속 학파의 이론을 한약과 침구에 활용하는 것으로 보인다. 망진 형상진단의 중요도와 활용도는 고르게 나타났으며, 망진에서 중요하게 활용하는 부위와 내용으로는 두면의 생김새, 신체 전반적 생김새, 신체 특징부위로 나타났다. 형상진단의 기전과 표준화 연구에 가장 적합한 연구방법론으로는 형상진단에 입각한 고전 문헌연구, 전문가의 형상분석에 대한 통계처리, 병증과 형상에 대한 임상데이터 구축 등이었다. 형상진단기에 대해 요구하는 기능은 형상유형감별, 오장육부 상태 진단, 표리한열 진단, 경락기운 진단 등으로 나타났으며, 형상진단기의 임상적인 활용도를 높일 수 있는 임상분야는 심혈관 질환, 뇌혈관 질환, 소화기 질환, 대사증후군 질환, 부인과 질환, 노인성 질환 등으로 고른 분포를 보였다.

• 한국방재학회:학술대회논문집
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• 2011.02a
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• pp.64-64
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• 2011

최근 전 세계적으로 구제역, 화산, 지진재해 등 장기적이고 광역적인 재해 재난의 심각성을 반영하는 듯 다양한 기술개발과 재난관리 적용성에 관한 연구가 전개되고 있다. 그 가운데 인공위성에 대한 가치와 활용에 대한 기대치가 높아짐에 따라 국내외로 신속한 재난대응 및 광역적 피해지역에 대한 조기분석 등에 관한 다양한 지원체계구축에 대한 연구가 심화되고 있다. 국내에서도 재해 재난에 대한 인공위성의 활용성 및 실무적 대안마련에 대한 검토가 시작되고 있으며, 특히 재해시 영상의 확보 및 분석과 의사결정지원 등 재난관리 프로세스에 대한 정부부처의 활용방안 마련에 대한 기대가 높아지고 있는 가운데 재난총괄기관인 소방방재청은 국립방재연구소에 방재영상분석팀을 신설하였다. 2010년 1월 HAITI 지진피해, 2010년 12월 삼척 산불모니터링, 2011년 1월 포항 폭설피해 등의 재해 재난 분석을 통해 의사결정지원체계를 구축하고 있다. 위성영상 분석기술은 국외기관과 비슷한 실정이나, 본질적으로는 영상촬영 및 수급문제 해소에 있다고 하겠다. 현재, 지구관측센터(KEOC) 및 한국항공우주연구원에서도 이와 같은 수급체계에 대한 문제의식을 공유하고 있다는 점은 재난관리업무 담당자로서 고무적이고 개선에 대한 희망이 밝다. 향후 본 연구를 기반으로 우리나라 재난관리업무에 있어 위성영상을 기반으로 하는 선제적이고 과학적인 재난관리기법이 개발되고 방재분야의 위성영상활용의 위상이 높게 제고 되었으면 한다. 이와 관련하여 본 논문에서는 현재 전 세계적으로 운영되고 있는 인공위성들을 대상으로, 시 공간 해상도별 분포도를 작성하여 인공위성의 특성을 살펴보았다. 특히, 한국항공우주연구원과 소방방재청에서 2010년 10월에 가입한 국제재해관리를 위한 위성영상활용 협력기구인 International Charter에서 재해 재난관련 위성영상 분석 및 현황을 조사하여 재난유형별 활용성을 검토하였다. 마지막으로 조사 분석된 내용을 토대로 위성영상을 통한 재난관리 분야에 적합한 업무 프로세스를 도출하였다. 또한, 재해발생지역에 대한 신속한 위성영상의 확보와 정량적 피해규모 파악에 따른 응급 복구지원이 가능한 대응전략에 대해서 검토하였다.

• Journal of Advanced Navigation Technology
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• v.13 no.5
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• pp.749-755
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• 2009

This paper described the design and implementation of the FRA(Fault Recovery Agent) for home network environment based on IP-USN. This system consists of a FDA, FSA, and FRA. FDA is an agent that detects an fault by hooking techniques for multimedia distance education based on IP-USN environment. FSA is an agent that is an fault sharing system for multimedia distance education based on IP-USN environment. FRA is a system that is suitable for recovering software fault for multimedia distance education running on home network environment based on IP-USN. It is necessary for the system to be protected by reactivity of media service instance instead of breaking process of session. This system is limited only for FRA modeling.

• Journal of Korea Game Society
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• v.6 no.3
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• pp.13-22
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• 2006

Games such as sports, RTS, RPG, which teams of players play, require advanced artificial intelligence technology for team management. The existing artificial intelligence enables an intelligent agent to have the autonomy solving problem by itself, but to lack interaction and cooperation between agents. This paper presents "Level Unified Approach Method" with effective role allocation and autonomy in multiagent system. This method allots sub-goals to agents using role information to accomplish a global goal. Each agent makes a decision and takes actions by itself in dynamic environments. Global goal of Team coordinates to allocated role in tactics approach. Each agent leads interactive cooperation by sharing state information with another using Databoard, As each agent has planning capacity, an agent takes appropriate actions for playing allocated roles in dynamic environments. This cooperation and interactive operation between agents causes a collision problem, so it approaches at tactics side for controlling this problem. Our experimental result shows that "Level Unified Approach Method" has better performance than existing rental approach method or de-centralized approach method.