• Proceedings of the Korean Society of Marine Engineers Conference
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• 2012.06a
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• pp.133-133
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• 2012

본 연구에서는 현재의 실내 위치인식시스템에 있어서 오차 발생 문제점을 초전센서를 이용하여 보완하였다. 기존의 CSS기술은 SDS-TWR(Symmetric Double-Sided Two-Way Ranging) 기반의 위치인식시스템을 구현하는 기술로 사용되고 있으나 전파의 반사 및 간섭에 의해 레인징의 오차가 크게 발생하고 수신 감도가 현저하게 떨어지는 현상이 발생한다. 따라서 본 논문에서는 환경적인 제약을 받는 공간에서 CSS을 이용한 SDS-TWR과 초전센서를 사용하여 수신불량과 오차를 줄여 사용자의 위치인식을 가능하도록 하였다.

• 한국IT서비스학회:학술대회논문집
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• 2002.06a
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• pp.141-146
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• 2002

AIN CS-3를 기반으로 하는 IMT-2000 망은 지능망의 구성 요소들과 통합 및 연동을 통하여 기존에 개발되었거나 앞으로 개발될 유선 지능망의 서비스들을 쉽게 수용할 수 있게 된다. 본 논문에서는 IMT-2000 및 IMT-2000과 연동되는 타 네트워크의 상이한 플랫폼 환경의 개발환경 및 향후 유지보수과정에서 발생 할 것으로 예측되는 TMN 시스템 내 에이전트의 Q3 인터페이스 구현상의 표준을 이룰 수 없다는 등의 문제점을 해결하기 위하여 I-Farmer 모델 및 I-Farmer 방법론을 제안하였다.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.427-428
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• 2019

본 논문에서는 히어로 영화의 최고가 마블이 되면서 PC 웹뿐만 아니라 모바일, 태블릿 등 환경에서도 구애받지 않고 관람할 수 있는 반응형 웹사이트 시제품을 구축하였다. 이 반응형 웹사이트는 HTML5와 CSS를 기반으로 어느 플랫폼에서나 이용가능하여 시간, 장소에 구애되지 않고 자신이 원하는 마블 영화 정보를 볼 수 있다는 장점을 가진다.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.431-432
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• 2019

현재 전 세계 인구 76억명 중 스마트폰 사용자는 70%이상으로 스마트폰이 대중화가 되어 집이든 밖이든 누구나 자유롭게 이용하고 있다. 이에 본 논문에서는 HTML5와 CSS3를 기반으로 4차 산업혁명 대표 기술 중 하나인 IoT기술로 만든 제품을 주문받고 설치해주는 반응형 서비스판매 웹을 구성하고자 한다. 기존 웹과의 차별성과 고객 개개인의 만족도를 위해 제품판매 뿐만 아니라 주문제작 가능도 구현하여 고객의 욕구를 충족시키고자 한다.

• Journal of Sensor Science and Technology
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• v.27 no.4
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• pp.232-236
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• 2018

A radiation detection sensor was developed and characterized by combining three types of CsI(Tl) scintillators and an array-type SiPM to detect the radioactive contamination of discharged water in real time. The characterization results showed that type 3 exhibited the most desirable characteristics in response linearity (R-square: 0.97889) according to detection sensitivity and incident radiation dose. Furthermore, in terms of spectral characteristics, type 3 exhibited 16.54% at 0.356 MeV (the emission gamma ray energy of $^{133}Ba$), 10.28% at 0.511 MeV (the emission gamma ray energy of $^{22}Na$), 9.68% at 0.356 MeV (the emission gamma ray energy of $^{137}Cs$), and 2.55% and 4.80% at 1.173 MeV and 1.332 MeV (the emission gamma ray energies of $^{60}Co$), respectively. These measurements confirmed the good energy characteristics. The results were used to evaluate the spectral characteristics and energy linearity in a mixed source using type 3 with the best detection characteristics. It was confirmed that the gamma ray peaks of $^{133}Ba$, $^{22}Na$, $^{137}Cs$, and $^{60}Co$ were well resolved. Moreover, it was confirmed that R-square, which is an indicator of energy linearity, was 0.99986. This indicates a good linearity characteristic. Based on this study, further commercialization studies will contribute to measurements in real time and to the management of the contamination caused by radioactive wastewater or radioactive material leakage, which originate from facilities that use radioactive isotopes or care facilities.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.5
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• pp.29-34
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• 2008

In this paper, we propose the channel sounding scheme which improves the reliability and performance of communication link and mitigate the fading effect of channel in MTMO-OFDM system having correlation between Tx and Rx antennas. And we estimate the channel propagation characteristics of channels between the transmitter and receiver with CS scheme by measuring the channel propagation characteristics using sounding signal. Multi agent system models can be used to analyze the path of the system within any time frame. Further, using this proposed method, we can increase the channel capacity by simple calculation in receiver and transmitter and allocate the optimal power by channel information in transmitter. Also, the increment of channel capacity using the prorposed method is induced as the number of antenna is increased. So, we can anticipate the performance improvement with the presented scheme in more complicated Tx and Rx antenna system.

• Korean Chemical Engineering Research
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• v.62 no.2
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• pp.181-190
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• 2024

Here, we develop a centrifugal microfluidic reactor with simple, fast, and high-throughput manner for the generation of magnetic Janus micro-adsorbents (MAs). By using the multi-micronozzle consisting of two separate aligned needles and centrifugal tubes, we have synthesized highly monodispersed Prussian blue- and magnetic nanoparticle-laden micro-adsorbents (PB-MNP-MAs). The enhanced cesium (Cs⁺) adsorption was demonstrated by conducting the adsorption isotherm and kinetics experiment which can be contributed to the porous nature of the Ca-alginate networks with a high surface area of embedded PB nanoparticles, resulting to perform rapid adsorption activity within 10 min. After Cs⁺ adsorption process, the as-synthesized PB-MNP-MAs were successfully harvested by introducing the external magnetic fields. Therefore, we believe that our findings can be provided new direction towards the development of advanced functional adsorbents in biological and environmental fields.

• The Research Journal of the Costume Culture
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• v.20 no.4
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• pp.485-499
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• 2012

This study suggests designs for fashion-cultural products that can communicate the uniqueness of Korean traditional culture. To this end, motives and printing patterns were created based on the formative beauty of traditional sewing crafts. A literature review was completed to identify characteristics of Korean traditional sewing, and the motives were developed through Adobe Illustrator CS4 and Adobe Photoshop CS4. Those motives were applied to handkerchiefs, neckties, pouches, and handbags. The sewing crafts used in this study included thimbles, bobbins, and chumoni (a Korean traditional pouch). The motives were produced in a manner that best exemplified the unique formative beauty of the sewing crafts while also presenting modern images of the crafts. The motives from thimbles reflected the lateral side of their originals, while the motives from bobbins adopted fan- or rectangular-shaped bobbins. The motives from chumoni were based on Duruchumoni and Guichumoni. A total of 12 motives were developed, and a total of 36 textile designs were suggested based on those motives. A total of 42 designs for fashion-cultural products, including handkerchiefs, neckties, pouches and handbags, were developed. Among them, motives applied to handkerchiefs were expanded to apply to scarfs, as well.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.5 s.347
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• pp.104-112
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• 2006

In this thesis, we analyze performance related to reduction scheme of intercell interference causing serious problems in wiBro system. Frequency reusing factor(FUF) is 1 in WiBro system, and it means that a adjacent cell uses same frequency band. This channel environment raises intercell interference problem, which provokes serious problems related to system performance and channel capacity. Consequently, it affects deterioration in system performance as a whole. We analyze intercell interference when appling a various schemes such as (DCA)Dynamic Channel Allocation, CS(Channel Segregation), IMUFR(Interference Mitigation Using Frequency Reuse), IDMA(Interleave Division Multiple Access), IDMA(Interleave Division Multiple Access), FH-OFDM, CRSA(Conceptual Random Subcarrier Allocation), and HDD

• The Journal of Korean Association of Computer Education
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• v.7 no.6
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• pp.77-84
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• 2004

This study proposed the agent system for educational information sharing using bookmark. In order to search and share the educational information effectively, we designed DAML+OIL-typed bookmark information. Proposed system in this study had the P2P type based on Client-Server type. We implemented the bookmark agent that has the intelligent characteristics, that is, automatic categorization of peers and documents, autonomous communication between agents using DAML, and delicate information searching using the ontology dictionary in Semantic Web environment. Hereafter, this study will contribute to activate sharing and searching educational information as well as proposed system will offer the important technologies for SCORM-based e-learning environment.