• Title/Summary/Keyword: C-Lab

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HEATING PERFORMANCE OF AIR SOURCE HEAT PUMP WITH HEAT REGENERATIVE DEVICE USING FIBER BELT

  • Ryou, Y.S.;Chang, J.T.;Kim, Y.J.;Kang, G.C.;Yun, J.H.;Lee, K.J.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • 2000.11c
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    • pp.647-653
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    • 2000
  • In this research the heat regenerative technology was employed to eliminate frosting on evaporator coil and improve COP of the heat pump system. This heat regenerative device(HRD) has very simple structure consisting a geared motor and a porous fiber belt passing through alternatively between cold and warm air duct. The laboratory test showed that the heat pump system with HRD yielded an impressive COP higher than 3.5 at the outside air temperature of $-7^{circ}C$ in heating mode.

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PV System with Battery Storage using Peak-cut Algorithm (피크컷 알고리즘을 적용한 에너지 저장장치를 갖는 태양광 시스템)

  • Lim, Jong-Ung;Han, D.H;Kim, S.Y;Ban, C.H;Choi, C.M;Choe, Gyu-Ha
    • Proceedings of the KIPE Conference
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    • 2012.11a
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    • pp.135-136
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    • 2012
  • Renewable energy is getting more important due to its alternative usage of fossil fuel. This paper discusses the system using Peak-cut alagorithm of solar power which takes great proportion in renewable energy. It also proves the validity of this system by simulation and experiment.

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A System-on-a-Chip Design for Digital TV

  • Rhee, Seung-Hyeon;Lee, Hun-Cheol;Kim, Sang-Hoon;Choi, Byung-Tae;Lee, Seok-Soo;Choi, Seung-Jong
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.5 no.4
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    • pp.249-254
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    • 2005
  • This paper presents a system-on-a-chip (SOC) design for digital TV. The single LSI incorporates almost all essential parts such as CPU, ISO/IEC 11172/13818 system/audio/video decoders, a video post-processor, a graphics/OSD processor and a display processor. It has analog IP's inside such as video DACs, an audio PLL, and a system PLL to reduce the system-level implementation cost. Descramblers and Smart Card interface are included to support widely used conditional access systems. The video decoder can decode two video streams simultaneously. The DSP-based audio decoder can process various audio coding specifications. The functional blocks for video quality enhancement also form outstanding features of this SoC. The SoC supports world-wide major DTV services including ATSC, ARIB, DVB, and DIRECTV.

Preconfigured Multicast Delivery Tree in Mobile IP (Mobile IP에서 기설정된 전달 트리를 이용한 멀티캐스팅 방안)

  • C.B. Chun;C.H. Kang;Lee, J.H.;Kwon, K.H.;Kim, B.S.;Hong, J.P.
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.10e
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    • pp.76-78
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    • 2002
  • Multicasting over mobile IP network becomes more important with the increasing needs of supporting multimedia services in mobile network. The IETF has suggested two approaches which are remote subscription and bidirectional tunneling for supporting mobility management in multicasting over mobile IP. But these protocols have problems - the frequent reconstruction of multicast delivery tree, packet less during handoff, convergence problem, and so on. In this paper, we propose to use preconfiguration of multicast delivery tree when mobile host enters the foreign network. It will decrease the frequency of multicast delivery tree reconstruction, and reduce the packet loss during handoff, Also the multicast delivery tree maintained by Keep Alive messages makes the signaling overload of networks diminished.

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Transport of space charge between sub-pixels in AC-plasma cell discharge

  • Lee, S.B.;Park, E.Y.;Han, Y.G.;Moon, M.W.;Oh, P.Y.;Song, K.B.;Lee, H.J.;Son, C.G.;Jeong, S.H.;Yoo, N.L.;Hong, Y.J.;Jeong, S.J.;Kim, J.H.;Park, S.O.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.929-931
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    • 2006
  • In this experiment, we have investigated that the transported space charge between sub-pixels in AC-plasma cell discharge. The test pulse 30 V, $5{\mu}s$ was applied to the address electrodes of neighbor cells of discharge occurred cells. And we have measured the transported space charge between sub-pixels in accordance with the various last sustain pulse widths t(time gap between the rising edges of sustain and test pulses) of 0.2 to $3{\mu}s$. It was observed that the peak value of transported space charge has been shown to be 21.5pC at $1.0{\mu}s$. And the IR peak value have been occured after $0.51{\mu}s$ with respect to sustain voltage.

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Effects of Combined Treatments of Lactic Acid Bacteria and Cell Wall Degrading Enzymes on Fermentation and Composition of Italian Ryegrass (Lolium multiflorum Lam.) Silage

  • Ridla, M.;Uchida, S.
    • Asian-Australasian Journal of Animal Sciences
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    • v.11 no.3
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    • pp.277-284
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    • 1998
  • This experiment was carried out to study the effects of lactic acid bacteria (LAB) inoculation and addition of cell wall degrading enzymes on the fermentation characteristics and chemical compositions of Italian ryegrass silage. An inoculant LAB with or without a cell wall degrading enzyme of Acremoniumcellulase (A), or Meicellulase (M) or a mixture of both (AM), was applied to 1 kg of fresh Italian ryegrass sample. The treatments were control untreated, LAB-treated (application rate $10^5$ cfu/g fresh sample), LAB+A 0.005%, LAB + A 0.01%, LAB+A 0.02%, LAB + M 0.005%, LAB + M 0.01%, LAB + M 0.02%, LAB+AM 0.005%, LAB + AM 0.01% and LAB+AM 0.02%. The sample was ensiled into 2-L vinyl bottle silo, with 9 silages of each treatment were made (a total of 99 silages). Three silages of each treatment were incubated at 20, 30 and $40{^{\circ}C}$ for an approximately 2-months storage period. All silages were well preserved as evidenced by their low pH values (3.79-4.20) and high lactic acid concentrations (7.71-11.34% DM). The fermentation quality and chemical composition of the control untreated and the LAB-treated silages were similar, except that for volatile basic nitrogen (VBN) content was lower (p < 0.05) in the LAB-treated silages. LAB + cellulase treatments improved the fermentation quality of silages by decreasing (p < 0.01) pH values and increasing (p<0.01) lactic acid concentrations, in all of cellulase types and incubation temperatures. Increasing amount of cellulase addition resulted in further decrease (p < 0.01) of pH value and increases (p < 0.01) of lactic acid and residual water soluble carbohydrate (WSC) concentrations. LAB + cellulase treatments reduced (p<0.01) NDF, ADF, hemicellulose and cellulose contents of silages compared with both the control untreated and LAB-treated silages. LAB + cellulase treatments did not affect the silage digestibility due to fact of in vitro dry matter digestibility (IVDMD) was similar in all silages. The silages treated with cellulase A resulted in a better fermentation quality and a higher rate of cell wall reduction losses than those of the silages treated with cellulases M and AM. Incubation temperature of $30{^{\circ}C}$ seemed to be more suitable for the fermentation of Italian ryegrass silages than those of 20 and $40{^{\circ}C}$.

Single Nucleotide Polymorphism in the Coding Region of Bovine Chemerin Gene and Their Associations with Carcass Traits in Japanese Black Cattle