• Coupled systems mechanics
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• 제4권1호
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• pp.67-98
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• 2015

Numerical prediction of dynamic behavior of fully coupled saturated porous media is of great importance in many engineering problems. Specifically, static and dynamic response of soils - porous media with pores filled with fluid, such as air, water, etc. - can only be modeled properly using fully coupled approaches. Modeling and simulation of static and dynamic behavior of soils require significant Verification and Validation (V&V) procedures in order to build credibility and increase confidence in numerical results. By definition, Verification is essentially a mathematics issue and it provides evidence that the model is solved correctly, while Validation, being a physics issue, provides evidence that the right model is solved. This paper focuses on Verification procedure for fully coupled modeling and simulation of porous media. Therefore, a complete Solution Verification suite has been developed consisting of analytical solutions for both static and dynamic problems of porous media, in time domain. Verification for fully coupled modeling and simulation of porous media has been performed through comparison of the numerical solutions with the analytical ones. Modeling and simulation is based on the so called, u-p-U formulation. Of particular interest are numerical dispersion effects which determine the level of numerical accuracy. These effects are investigated in detail, in an effort to suggest a compromise between numerical error and computational cost.

• 전기학회논문지P
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• 제60권3호
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• pp.155-160
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• 2011

IPTV functions not only as media player that does play the broadcasting industry's contents, also as the gateway is guaranteed of QoS(Quality of Service). This is for free contents-sharing that device stores contents using home network circumstance, and is for watching with seamless network service. Also this have required next QoS model that can handle stably as it may contain more data of the small computing device in next generation home system. We need ubiquitous-oriented QoS's design and development project that focuses on internal and external media service, not the existing QoS nor one-sided QoS of media sevice industry. This paper focuses on network module development. This supports IPTV in media industry and two-way capability of QoS highlighting multimedia service in network industry. In additional, this can handle stably the multiplex signal of USN/RFID as the representative ubiquitous and home network that services high-speed wire and wireless interface, and support the seamless u-QoS.

• 한국버섯학회지
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• 제11권2호
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• pp.87-91
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• 2013

느타리 버섯 No. 42균주를 5가지 배지에서 연구한 결과, 리그닌 분해효소인 Lac와 MnP는 생산되었으나 LiP는 생산되지 않았다. 실험한 본 균주의 경우 리그닌 분해효소인 Lac와 MnP의 생산에 밀기울이 관여하는 것을 확인 할 수 있었다. 액체배지에서는 GPYW에서 Lac(2.4 U/ml)와 MnP(3.6 U/ml)가 최대 생산됨을 알 수 있었으며 고체배지에서는 WMW에서 MnP(4.0 U/ml)가 최대 생산되었으며 W에서는 Lac(11.0 U/ml)가 최대 생산되었다.

• 센서학회지
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• 제21권5호
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• pp.352-358
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• 2012

A sensor network system can be an efficient tool for healthcare telemetry for multiple users due to its power efficiency. One drawback is its limited data size. This paper proposed a real-time application of data compression/decompression method in u-Health monitoring system in order to improve the network efficiency. Our high priority was given to maintain a high quality of signal reconstruction since it is important to receive undistorted waveform. Our method consisted of down sampling coding and differential Huffman coding. Down sampling was applied based on the Nyquist-Shannon sampling theorem and signal amplitude was taken into account to increase compression rate in the differential Huffman coding. Our method was successfully tested in a ZigBee and WLAN dual network. Electrocardiogram (ECG) had an average compression ratio of 3.99 : 1 with 0.24% percentage root mean square difference (PRD). Photoplethysmogram (PPG) showed an average CR of 37.99 : 1 with 0.16% PRD. Our method produced an outstanding PRD compared to other previous reports.

• International Journal of Advanced Culture Technology
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• 제11권2호
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• pp.291-297
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• 2023

This paper intends to shed light on how the advent of streaming services pioneered by Netflix has been affecting the media landscape in the U.S. by looking at Disney's entry into streaming services and what effects this might have had. The paper first looks at the rise of Netflix, the disruptive impact it had on cable and film businesses, and the challenges this has posed to traditional media conglomerates like Disney. In this context, the paper examines Disney's decision to enter into streaming services as a move to counter both these challenges and Netflix's growing power. Finally, the paper notes the changes Disney's entry is likely to bring about, notably the continued disruption of film and television as streaming business expands, as well as the potential of Disney's streaming services to challenge Netflix and further strengthen its media empire.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (D)
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• pp.146-151
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• 2006

앞으로 다가올 U-City (Ubiquitous City) 환경에서는 도시 내에 설치된 카메라를 통해서 각종 정보를 수집해야 하는 경우가 많다. 수집된 정보들은 그 양이 방대하고 복잡하므로 이를 효과적으로 저장하고 전달하기 위해서는 분산된 환경의 카메라 네트워크 시스템에 대한 연구가 필요하다. 본 논문에서는 도시 내에 분산된 카메라 네트워크를 효율적으로 관리하고, 수집된 정보를 필요로 하는 모듈 서버에게 효과적으로 분배하는 U-City 지향적 시스템에 대한 설계를 제시하고 그 기반 연구를 진행한다.

• 방송과미디어
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• 제13권2호
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• pp.17-27
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• 2008

• 방송과미디어
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• 제20권1호
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• pp.55-67
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• 2015

• 방송과미디어
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• 제20권1호
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• pp.75-84
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• 2015

• 방송과미디어
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• 제20권1호
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• pp.85-95
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• 2015