• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.711-714
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• 2009

Currently digital contents such as games, animation and video art are produced and distributed actively. And moreover by the development of related industries, a variety genre of media is in the process of planning and production. However general-purpose tools such as MAYA and Soft Image do not provide the artists in terms of a variety of unique functions. Thus in this study, we analyzed and developed interface technologies that can help effectively in terms of animation scenario writing, storyboard simulation, rendering and pre-production of story board, interface technology for preview. By our designed simulate planning, people who not professional in the field of animation, can produce and preview animation easily.

• Journal of Advanced Marine Engineering and Technology
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• v.36 no.2
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• pp.309-314
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• 2012

In this paper, we present surface-to-underwater visible light communication systems using white LEDs. Pulse position modulation (PPM)-based analogue data communications and on-off keying-based digital data communications systems are developed. Inexpensive and commercial power-LEDs and photo-diodes are used to construct two types of systems. We report the experimental results obtained from the prototype systems to show the possibility of an optical underwater visible light transceiver as a basis for short range underwater wireless network. Their performance deteriorates more than the atmosphere's one because of attenuation and scattering of the light in water, but these results are promising for the potential to create more robust network interface that improve medium performance such as a LED modulation and a photo-detector demodulation.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.2
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• pp.157-166
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• 2004

Recently, switchboards for MV/LV distribution customers have been united and digitalized rapidly. This paper suggestes the effective information visualization method for the data mesured from cubicle switchboard for MV/LV distribution customers. We developed the algorithm that analyzes a large number of mesured data and displays them to users overall, such as fire index, power condition index, switchboard safety index, and power diminution index. Using a touch screen made users to operate it easily. User interface was also strengthened by taking graph visualization. We guess the information visualiztion method suggested in this paper shows the new direction that heavy electrical equipments including switchboards are going to develop in the future.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.110-112
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• 2015

지상파 디지털멀티미디어방송(T-DMB)을 이용하여 국지적인 재난경보 방송을 실시하고 있지만 산간오지 등과 같은 전파 음영 지역에는 시설 투자의 한계로 서비스가 제한되고 있는 실정이다. 무선 마을 방송 시스템은 ISM 밴드 주파수를 사용하고 있으며 마을 방송용으로 주파수를 제한하여 간섭영향이 상대적으로 적은 장점을 갖는다. 본 논문에서는 T-DMB 재난 방송을 기존 무선 마을 방송 시스템의 장점을 이용하여 산간오지의 댁내까지 방송 가능한 시스템을 제안하였다. 재난 발생시 T-DMB 특수 수신기의 재난 방송 출력 신호를 무선 마을 방송 송신기와 복수의 댁내 무선 수신기를 통하여 방송 가능한 구조이며 T-DMB 수신기와 무선 방송 송신기간에는 접점 인터페이스를 통하여 정확한 시퀀스 제어가 필요하다. 무선 마을 방송 시스템은 UHF 대역의 ISM 밴드 무선 주파수를 이용하여 오지산간 지역의 부락에 적합한 특성을 갖고 있다. 장애물로 인한 장거리 전송의 한계는 무선 중계기를 이용하여 커버리지를 확장 가능하다. 따라서, 본 논문에서는 T-DMB 재난 방송을 재송신하는 수단으로 ISM 밴드와 연동할 경우 방송 음영지역 해소 및 재난 방송 수신율이 개선되어 국지적 재난에 대한 대국민 인명과 재산보호에 기여할 것으로 판단된다.

• Convergence Security Journal
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• v.19 no.4
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• pp.189-195
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• 2019

PPL advertising is growing due to the cheaper cost than other TV commercials, the familiar image construction from natural exposure in video, and the overseas marketing effects from programs export. However, it is difficult to provide additional information on PPL advertising targets in addition to short video exposure due to the restriction that they should be exposed without antagonizing viewers. This study designed a data service that supports PPL advertising, which provides additional information for PPL advertising targets. Specifically, the user scenario and user interface of the data service were designed considering the characteristics of the TV platform, the key additional information was defined by distinguishing the typical types of PPL advertisement, and the information on when PPL advertising targets should be exposed in the program was devised. We also developed a DVB-SI based method to provide the supplementary information to the data service.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.37 no.5
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• pp.36-47
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• 2000

The CDMA digital cellular systems provide better voice Quality than analog systems, however there exists inherent delays due to speech coding and transmission processing, which brings echoes returned by the BSC and PSTN interface. In this paper, we show the performance improvement of a proposed echo canceller by real time implementation, where Block Update NLMS algorithm is applied into the TMS320C54X DSP. By applying the proposed method into the practical mobile phone, we verify that various types of echoes (LE, ESE, AE) may be removed more precisely. We also cope with echo path change resulting from change of delay length after taking VAD to find echo path delay.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.5
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• pp.143-150
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• 2017

In this paper, we propose a novel motion recognition platform using smart-phone tracking and color communication. The interface requires only a camera and a personal smart-phone to provide a motion control interface rather than expensive equipment. The platform recognizes the user's gestures by the tracking 3D distance and the rotation angle of the smart-phone, which acts essentially as a motion controller in the user's hand. Also, a color coded communication method using RGB color combinations is included within the interface. Users can conveniently send or receive any text data through this function, and the data can be transferred continuously even while the user is performing gestures. We present the result that implementation of viable contents based on the proposed motion recognition platform.

• The Journal of the Korea Contents Association
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• v.13 no.11
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• pp.159-166
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• 2013

This paper aims to not giving one time pleasure nor curiosity, but applying and sharing philosophical discourse for contemporary citizens with reflectivity in a realm of media art. This paper shows the result from the class which the author conducted with philosophical discourse, case analysis, ideation and progress into practical works. Through the process of doing ideation and realization of media art work with students, this paper shows that theory and practice can be harmonized and penetrated into deeper level with diverse interface experiments.

• Journal of KIISE:Databases
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• v.35 no.5
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• pp.400-410
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• 2008

Flash memory has been widely used in mobile devices, such as mobile phone and digital camera. Recently flash SSD(Solid State Disk), having same interface of the disk drive, is replacing the hard disk of some laptop computers. However, flash memory still cannot be considered as the storage of database systems. The FTL(Flash Translation Layer) of commercial flash SSD, making flash memory operate exactly same as a hard disk, shows poor performance on the workload of databases with many random overwrites. Recently In-Page Logging(IPL) approach was proposed to solve this problem. In this paper, we implement IPL approach on SQLite, a popular open source embedded DBMS, and evaluate its performance. It improves the performance by up to 30 factors for update queries.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.12 no.6
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• pp.612-620
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• 1987

In this paper, the optical modem for data link realization is designed with the advantages of optical fiber, large bandwidth, high speed and long haul communication. Modem interface, CCITT V.24 and EIA RS-232C is adopted for the compatibility with existing systems, and biphase coding format is used for digital modulation. And also, modem has serveral loopback test facility in order to diagnose system itself. Optical transmitter and receiver are designed to have the receiving sensitivity of -30dBm at $10^-9$BER in the short wavelength region. Developed system is capable of transmitting data rate at 1200bps up to 57.6Kbps in sync., and at any bps within DC to 200Kbps in async transmission.