• Journal of the Korean Society of Propulsion Engineers
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• v.16 no.3
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• pp.9-15
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• 2012

This research simulates the ultrasonic wave propagation in multi-layered media using generalized formular of system response function. We made the artificial defect specimen of a rocket motor and compared with experimental wave forms. The simulation results are coincide with measured waves and we found that the pulse echo method is able to detect unbond defect at liner-propellant interface.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2000.04a
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• pp.120-125
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• 2000

We propose a semi-automatic and dynamic indexing algorithm for multi-media database(e.g. movie files, audio files), which are difficult to create indexes expressing their emotional or abstract contents, according to user's sensitivity by using user's histories of access to database. In this algorithm, we simply categorize data at first, create a vector space of each user's interest(user model) from the history of which categories the data belong to, and create vector space of each data(title model) from the history of which users the data had been accessed from. By continuing the above method, we could create suitable indexes, which show emotional content of each data. In this paper, we define the recurrence formulas based on the proposed algorithm. We also show the effectiveness of the algorithm by simulation result.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.912-918
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• 2011

This research simulates the ultrasonic wave propagation in multi-layered media using generalized formular of system response function. We made the artificial defect specimen of a rocket motor and compared with experimental wave forms. The simulation results are coinciede with mesuared waves and we found that the pulse echo method is able to detect disbond at liner-propellant interface.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1508-1511
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• 2007

This paper introduces a new texture prediction for MVC( Multi-view Video Coding) which is currently being developed as an extension of the ITU-T Recommendation H.264 | ISO/IEC International Standard ISO/IEC 14496-10 AVC (Advanced Video Coding) [1]. The MVC's prcimary target is 3D video compression for 3D display system, thus, key technology compared to 2D video compression is reducing inter-view correlation. It is noticed, however, that the current JMVM [2] does not effectively eliminate inter-view correlation so that there is still a room to improve coding efficiency. The proposed method utilizes similarity of interview residual signal and can provide an additional coding gain. It is claimed that up to 0.2dB PSNR gain with 1.4% bit-rate saving is obtained for three multi-view test sequences.

• Journal of Advanced Navigation Technology
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• v.18 no.1
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• pp.74-77
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• 2014

This paper suggested an error control for multi-channel running on machine to machine environment. This system is suitable for recovering software fault for multimedia CSCW(Computer Supported Cooperative Works) based on machine to machine environment. It is necessary for the system to be protected by reactivity of media service instance instead of breaking process of session. This paper explains a performance analysis of an error recovery system of M2M based computing collaboration environment using rule-based DEVS modeling and simulation techniques.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1998.04a
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• pp.183-188
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• 1998

미래를 예측하는 가장 정확한 방법은 미래를 창조하는 것이다. 본 논문은 멀지않은 미래를 창조하는 것이다. 본 논문은 멀지않은 미래에 우리 앞에 놓일 기술과 제품에 대한 예측과 창조를 위하여 연구된 결과이다. 인간의 생활을 풍요롭게 할 수 있는 기술롸 제품을 인간 중심으로, 인간에게 만족스럽게 개발하기 위해서 인간의 생활 특성과 함께 기계화 인간 사이의 관계를 새롭게 정리하였다. 또 인간의 COMMUNICATION생활에서 그 비중을 급속히 증가시켜 가고 있는 Haman-Machine(Computer) Interaction에 대한 정밀한 고찰을 통하여 인간 중심의 Human-Machine Interaction 을 가능하게 할 Interface로서의 MultiMedia개념을 도출하였다. 개인의 감성은 감정과 구분되는 심리 변화로, 감정에 비하여 강도는 약하나 일상 생활에서 개인의 생각과 행동에 중요한 영향을 미친다. 감성은 외부의 감각자극에 대하여 직관적이고 반사적으로 발생되며, 개인의 생활경험과 상황에 따라 다양하게 변화된다. 제품에 대한 소비자의 욕구는 단순한 보유욕구에서 비교우위욕구, 사용성 욕구를 거쳐 감성욕구로 변환된다. 미래의 인간 생활에 필요한 기술과 제품은 인간의 COMMUNICATION생활과 감성 특성을 반영하여 감성적 MultiMedia 와 감성인터페이스의 개념으로 창조되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1788-1790
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• 2015

태권도의 승급 및 승단의 경우 심판 및 심사위원의 주관적인 평가에 의존하고 있다. 이러한 주관적인 평가는 판정시비 및 편파 판정과 같은 문제를 야기 시킨다. 제안하는 연구는 이러한 편파 판정의 시비가 발생할 경우 객관적인 입장에서 데이터를 기록하고 확인할 수 있도록 하는 디지털화된 정보를 제공하기 위한 방안을 연구했다. 본 연구에서는 태권도 수련자 및 승급 승단자가 모니터링하고 평가를 할 수 있는 시스템으로 제스처 인식에 사용하는 양안카메라를 제안하고 시스템 운용 방안을 연구했다.

• Journal of Korea Multimedia Society
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• v.25 no.1
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• pp.61-71
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• 2022

When communication such as light, radio wave, or magnetic field is used underwater, the communication distance is very short, so sound waves are mainly used. However, by combining the strengths of each medium and communicating, stable communication may be possible. Underwater multi-media communication requires a protocol stack that supports it, which is very complex. To this end, this paper proposes a standard protocol stack and modeling technique to enable easy protocol stack modeling for the purpose. In fact, in this paper, a random model was created and analyzed through the proposal of modeling elements and similarity measurement methods, and as a result, it was analyzed that it was very helpful in creating a new model based on a standard model.

• Broadcasting and Media Magazine
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• v.4 no.4
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• pp.46-51
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• 1999

The introduction of broadcast digital television (DTV) was, at one time, seen as an opportunity to rationalise video formats. The reality is quite different with a rapid divergence as the united States' ATSC offers 18 formats to cover both standard definition (SD) and high definition (HD), and yet more are supported by Europe's DVB. At the same time multi-media is expanding both as an area for source material and for finished work. Post production needs to move away from single-format facilities as requirements for multi-format operation is already increasing. A 'format-independent' solution is described which allows efficient operation with any mix of input formats and able to output any format with high quality. Attention is given to retaining the speed, accuracy and immediacy which is a feature of today's professional facilities -even while handling the greater demands of HD. Another route, using 24 frames-per-second is also examined.

• Korea Multimedia Society
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• v.2 no.1
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• pp.83-91
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• 1998