• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제13권3호
• /
• pp.1213-1237
• /
• 2019

Vehicular Ad-hoc Network (VANET) facilities envision future Intelligent Transporting Systems (ITSs) by providing inter-vehicle communication for metrics such as road surveillance, traffic information, and road condition. In recent years, vehicle manufacturers, researchers and academicians have devoted significant attention to vehicular communication technology because of its highly dynamic connectivity and self-organized, decentralized networking characteristics. However, due to VANET's high mobility, dynamic network topology and low communication coverage, dissemination of large data packets (e.g. multimedia content) is challenging. Clustering enhances network performance by maintaining communication link stability, sharing network resources and efficiently using bandwidth among nodes. This paper proposes a mobility-based, multi-hop clustering algorithm, (MBCA) for multimedia content broadcasting over an IEEE 802.11p-LTE-enabled hybrid VANET architecture. The OMNeT++ network simulator and a SUMO traffic generator are used to simulate a network scenario. The simulation results indicate that the proposed clustering algorithm over a hybrid VANET architecture improves the overall network stability and performance, resulting in an overall 20% increased cluster head duration, 20% increased cluster member duration, lower cluster overhead, 15% improved data packet delivery ratio and lower network delay from the referenced schemes [46], [47] and [50] during multimedia content dissemination over VANET.

• Mass Spectrometry Letters
• /
• 제12권1호
• /
• pp.16-20
• /
• 2021

We aimed to compare the content of ginsenosides and the pharmacokinetics after the oral administration of four different ginseng products at a dose of 1 g/kg in rats. The four different ginseng products were fresh ginseng extract, red ginseng extract, white ginseng extract, and saponin enriched white ginseng extract prepared from the radix of Panax ginseng C.A. Meyer. The ginsenoside concentrations in the ginseng product and the rat plasma samples were determined using a liquid chromatography-tandem mass spectrometry (LC-MS/MS). Eight or nine ginsenosides of the 15 tested ginsenosides were detected; however, the content and total ginsenosides varied depending on the preparation method. Moreover, the content of triglycosylated ginsenosides was higher than that of diglycosylated ginsenosides, and deglycosylated ginsenosides were not present in any preparation. After the single oral administrations of four different ginseng products in rats, only four ginsenosides, such as 20(S)-ginsenosides Rb1 (GRb1), GRb2, GRc, and GRd, were detected in the rat plasma samples among the 15 ginsenosides tested. The plasma concentrations of GRb1, GRb2, GRc, and GRd were different depends on the preparation method but pharmacokinetic features of the four ginseng products were similar. In conclusion, a good correlation between the area under the concentration curve and the content of GRb1, GRb2, and GRc, but not GRd, in the ginseng products was identified and it might be the result of their higher content and intestinal biotransformation of the ginseng product.

• 정보학연구
• /
• 제4권2호
• /
• pp.69-81
• /
• 2001

지능형 기본구조에 의존하는 내용기반 정보검색 시스템을 발전시키기 위한 많은 노력들이 진행중이다. 실세계에 존재하는 상황을 구축하고 유지하며, 동적 지식 표현을 실용화하고, 문맥을 이용하고, 그리고 진보된 추론과 학습능력을 이용하여 실세계에 존재하는 상황을 구축하고 유지하는 능력을 지능이라고 간주하여 이 지능을 채택한 진보된 내용기반 정보검색시스템을 제안하였다. 지능의 이러한 요소들은 인간의 지각과 인지에 정합하는 의미적 수준에서 시각 정보를 검색하기 위한 효과적인 시스템을 만들어내기 위해 필요로 하는 것들이다. 본 논문에서는 인간이 가지고 있는 지능과 인지 심리학, 인공지능, 기호학의 분야에 존재하는 지능시스템의 구축에 관련한 연구들을 조사해 본 후, 기존의 내용기반 정보검색 시스템의 능력을 개선하기 위해 본 논문에서 제안한 멀티미디어 지식 표현 모형인 MMNet을 알아보고, 이것을 이용하여 시각 정보를 자동적으로 추출하기 위한 지능형 내용기반검색시스템 모형을 만들어 보았다.

• 한국지능시스템학회:학술대회논문집
• /
• 한국퍼지및지능시스템학회 2005년도 추계학술대회 학술발표 논문집 제15권 제2호
• /
• pp.161-164
• /
• 2005

Mobile device users are sensitive to pay telecommunication charge for downloading Internet data, because the cost is proportional to the amount of data received. If there are device users who want to download the same content, they may cooperate each other to form an ad hoc network and share the partially downloaded content in order to reduce the amount of data downloaded. Each mobile device, called a peer, downloads a specific portion of the whole content using fee-based telecommunication channel, and exchanges the portion with other peers with free ad hoc channel in order that all participating peers are able to reconstruct the whole content in this situation, al1 participating peers become senders and receivers at the same time. In order to distribute the partial content to other peers, the ad hoc network requires a control led distribution mechanism. This paper introduces the per-peer-based distribution method in which one designated peer can transmit partial data to its neighbors at a time. Simulation results show that 90$\%$ of the telecommunication cost is saved with as few as 10 peers .

• 한국지능시스템학회:학술대회논문집
• /
• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
• /
• pp.224-227
• /
• 2003

The Intrsuion Detecion Systems(IDS) are required the accuracy, the adaptability, and the expansion in the information society to be changed quickly. Also, it is required the more structured, and intelligent IDS to protect the resource which is important and maintains a secret in the complicated network environment. The research has the purpose to build the model for the intelligent IDS, which creates the intrusion patterns. The intrusion pattern has extracted from the vast amount of data. To manage the large size of data accurately and efficiently, the link analysis and sequence analysis among the data mining techniqes are used to build the model creating the intrusion patterns. The model is consist of "Time based Traffic Model", "Host based Traffic Model", and "Content Model", which is produced the different intrusion patterns with each model. The model can be created the stable patterns efficiently. That is, we can build the intrusion detection model based on the intelligent systems. The rules prodeuced by the model become the rule to be represented the intrusion data, and classify the normal and abnormal users. The data to be used are KDD audit data.

• 한국지능시스템학회논문지
• /
• 제15권7호
• /
• pp.794-799
• /
• 2005

본 논문에서는 효율적인 동적 컨텐츠 출판을 지원하는 XML 기반 웹 컨텐츠 관리 시스템인 EasyCM을 설계하였다. EasyCM은 효율적인 동적 웹 컨텐츠 출판을 지원하기 위해 XML 기반의 컨텐츠 관리 시스템의 출판에서 필요한 컨텐츠저장소로부터 XDL 객체의 추출과 XSLT를 이용한 HTML 변환의 추가적인 처리과정을 전처리하여 컨텐츠 컴포넌트를 생성하고 사용자 요청시 컨텐츠 컴포넌트를 최종 웹 페이지로 조립하여 출판함으로써 컨텐츠의 재사용성을 향상시켰다. 또한 EasyCM의 성능을 향상시키기 위해서 기반 데이터와 동적 컨텐츠 컴포넌트간의 종속정보를 Dependency Map으로 유지하여 동적 컨텐츠 캐싱을 지원한다. 이를 위해서 EasyCM은 XML 출판 프레임워크인 Cocoon2를 기반으로 하고, 동적 컨텐츠 캐싱이 가능하도록 Cocoon2의 캐싱 구조를 화장하였다. 본 논문에서 설계한 확장된 캐싱 시스템은 캐싱된 컨텐츠의 효율적인 갱신을 지원하기 위하여 동적 컨텐츠의 특성에 따른 두 가지 갱신 유형, 즉 즉시갱신과 지연갱신을 지원한다.

• 한국멀티미디어학회논문지
• /
• 제8권6호
• /
• pp.814-826
• /
• 2005

The user-centric broadcasting environment includes the agent system and personalized broadcasting services for user-adaptive TV watching. In this paper, we propose broadcasting environment consisting of personalized broadcasting services and a multi-agent broadcasting system for the services. The proposed system employs the intelligent agent technology of the Foundation for Intelligent Physical Agents (FIPA) as well as metadata technology of MPEG-7 and TV-Anytime Forum (TVAF). To verify the usefulness of the proposed environment, we implemented a test-bed and demonstrated the proposed agent system with three services including intelligent user-information management service, information mobility service, and content retrieval service.

• 한국ITS학회:학술대회논문집
• /
• 한국ITS학회 2008년도 제7회 추계학술대회 및 정기총회
• /
• pp.525-530
• /
• 2008

• 전자통신동향분석
• /
• 제35권5호
• /
• pp.123-133
• /
• 2020

With the development of artificial intelligence (AI) and 5G technology, an ecosystem of digital content is gradually becoming intelligent, immersive, and convergent. However, there is not enough ultra-realistic content for the ecosystem. For ultra-realistic content services, creative content technologies using AI are being developed. This paper introduces the trends in and prospects of creative content technologies such as 3D content creation, digital holography, image-based motion recognition, content analysis/understanding/searching, sport AI, and content distribution.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제12권1호
• /
• pp.77-85
• /
• 2012

This paper describes a novel approach to adaptive courseware generation. This approach adopts its structure from existing intelligent tutoring systems and introduces a new component called pedagogical scenario model to support pedagogical flexibility in the adaptation process of courseware generation system. The adaptation is carried out using Dynamic Constraint Satisfaction Problem framework, which is a variant of classical Constraint Satisfaction Problem, to deliver courseware tailored to individual learner. Such a framework provides a high level of expressiveness to deal with the particular characteristics of courseware generation problem. Further, it automatically designs a sound courseware satisfying the design constraints imposed by the domain, the pedagogical scenario and learner models.