• Title/Summary/Keyword: plastic fiber media

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Embedded System Design of Automotive Media Server Platform with the MOST Interface (MOST 인터페이스를 갖는 차량용 미디어 서버 플랫폼에 대한 임베디드 시스템 설계)

  • Kwak, Jae-Min;Park, Pu-Sik
    • Journal of Advanced Navigation Technology
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    • v.10 no.3
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    • pp.262-267
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    • 2006
  • For growing need for the multimedia application in the vehicles, the MOST protocol has been focused on. The MOST protocol supports three kinds of communication modes; short control message, asynchronous packets, and reserved synchronous stream data. Because of a variety of transportation, the MOST is suitable for various applications in vehicle environment. In this paper, we implemented embedded system which is MOST-enabled AMS platform and tested the network communication operation through the control port and the synchronous channel of the source port. We implemented the prototype platforms which communicate each other on the MOST's POF network. Moreover we implemented the DivX decoder attached AMS platform and verified the operation by transferring the video stream and the control messages through the MOST network.

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Photodegradation of VOCs by Using TiO$_2$-Coated POF (광촉매가 코팅된 플라스틱 광섬유을 이용한 VOC 광분해반응)

  • Ha, Jin-Wook;Joo, Hyun-Ku
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.4 no.3
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    • pp.199-203
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    • 2003
  • In this study plastic optical fibers (POFs) were considered as light-transmitting media and substrates for the potential use in photocatalytic environmental purification system. After the characteristics of POFs in terms of light transmittance and absorption were determined at the beginning, the further investigation was performed through the photocatalytic degradation of trichloroethylene (TCE), iso-propanol and etc. with TiO$_2$-coated optical fiber reactor systems (POFR). It is concluded that the use of POFs is preferred to quartz optical fibers (QOFs) since the advantages such as ease of handling, lower cost, relatively reasonable light attenuation at the wavelength of near 400nm can be obtained. Various geometrical reactor shapes have been constructed and applied for the last one and half years. For the use of POF in water phase treatment, however, more detailed scientific and engineering aspects should be envisaged. This case requires a suitable mixture to obtain more stable and innocuous immobilization of photocatalyst on POF. To overcome this disadvantage, metal-organic chemical vapor deposition (MOCVD) was conducted in a fluidized bed to deposit thin films of titania on glass and alumina beads. Those can be used as photocatalysis for the removal of pollutants especially in liquid phases.

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Emission Factors of Chemical Substances and the Abatement Policies in Korea Industries (화학물질 배출량 변동 요인과 배출저감 정책의 조합)

  • Rhee, Hae-Chun
    • Environmental and Resource Economics Review
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    • v.18 no.4
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    • pp.653-693
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    • 2009
  • Using the Korean environmental input output analysis, this paper provides the emission intensities of the chemicals, especially, the toxic and carcinogenic substances, by linking the structure of demand, and the policy mix to abate these substances emissions. Acording to the results, Industries with the highest total emission intensities(TEI) of toxic substances are ranked : Printing and reproduction of recorded media(21), Other transportation equipment(26), Pulp and paper(11), Leather and fur products(9), Fiber yarn and fabrics(7). And the highest TEI of carcinogenic substances are Wood and wooden products(10), Motor vehicles and parts(25), Plastic and rubber products(15), Audio, video and communications equipment(23), etc.. The economic factors of changing these emissions are emission intensities and final demands. The effective combinations of policy instruments to abate these emissions are varied by the industries and substances. For example, Government need to execute the effective TEI management in the Fiber yarn and fabrics(7) sector, and, in furniture(27) sector, the reduction of final demand is more effective.

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