• Title/Summary/Keyword: D.B.H. analysis

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Performance Improvement Using the Adaptive Selection of H.263+ Negotiable Option Modes (H.263+ 협상모드들의 적응적 선택에 의한 성능개선)

  • 김강욱;황찬식;김남철;고종석
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.24 no.10B
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    • pp.1963-1970
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    • 1999
  • Researches in draft recommendation H.263 have been made in ITU-T LBC group to broaden its range of useful application and to improve its compression performance. The form of added and revised draft text of H.263 is informally known as “H.263+”. In this paper, we analyzed the characteristics of H.263+ negotiable option modes for four image classes. Based on the analysis results, we proposed the adaptive selection scheme of H.263+ option modes by using a scene change detector for a mixed image class. In case of using the proposed scheme, we obtained the 1.6dB improvement in PSNR compared to the basic mode of H.263, and the 0.4~1.0 dB improvement in PSNR compared to the fixed usage scheme of H.263+ negotiable option modes. In respect to used bits per frame, fewer bits are produced than the basic mode H.263 and the foxed usage scheme of H.263+ option modes.

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The Synthesis and Characterization of Some Novel Thioethers: Thio-Subsituted [3]Cumulenes, -1-Buten-3-ynes and Buta-1,3-dienes

  • Ibis, Cemil;Sahin, Aysecik
    • Bulletin of the Korean Chemical Society
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    • v.31 no.8
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    • pp.2255-2260
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    • 2010
  • In this study, some novel thiosubstituted butenyne (3a-d, 7b, 15b), butadiene (4a-b, 4d, 5a, 5c, 6b, 8e, 9c, 10b, 16b, 18e) and [3]cumulene (11a-b with isomer 3a-b, 12a with isomer 13a, 14b, 17e) compounds were synthesized from the reaction of 2H-pentachloro-1,3-butadiene with thiols. The new compounds were characterized by elemental analysis, mass spectrometry, UV-vis, IR, 1H NMR, NMR ($^{13}C$ or APT) spectroscopy.

B-H Loop Measurement of a High Tensile Steel Plate (사각판재형 강재의 자기특성측정)

  • Kim, Young-Hak;Kim, Ki-Chan;Shin, Kwang-Ho;Kim, Hwi-Seok;Yoon, Kwan-Seob;Yang, Chang-Seob
    • Journal of the Korean Magnetics Society
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    • v.20 no.3
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    • pp.94-99
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    • 2010
  • Minor B-H loop measurement for a rectangular high tensile steel was obtained by using Labview. A ferrite cores of high permeance with primary and secondary windings on the steel plate were used to form a closed loop of magnetic flux. To compensate errors due to an extremely small gap between a pair of ferrite core, and between the ferrite core and the rectangular high tensile steel, quadratic function of least square method was used. Also a 3D FEM magnetic analysis tool was used to measure H and B of the steel. B-H loop of the high tensile steel plate can be measured up to 520 A/m of a magnetic field and 0.15 T of a magnetic flux density.

HOT CHANNEL ANALYSIS CAPABILITY OF THE BEST-ESTIMATE MULTI-DIMENSIONAL SYSTEM CODE, MARS 3.0

  • JEONG J.-J.;BAE S. W.;HWANG D. H.;LEE W. J.;CHUNG B. D.
    • Nuclear Engineering and Technology
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    • v.37 no.5
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    • pp.469-478
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    • 2005
  • The subchannel analysis capability of MARS, a multi-dimensional thermal-hydraulic system code, has been enhanced. In particular, the turbulent mixing and void drift models for the flow-mixing phenomena in rod bundles were improved. Then, the subchannel analysis feature was combined with the existing coupled system thermal-hydraulics (T/H) and 3D reactor kinetics calculation capability of MARS. These features allow for more realistic simulations of both the hot channel behavior and the global system T/H behavior. Using the coupled features of MARS, a coupled analysis of a main steam line break (MSLB) is carried out for demonstration purposes. The results of the calculations are very reasonable and promising.

A Study on the Cooling Load of South and East Facing Apartment Houses (남향과 동향 집합주택의 냉방부하에 관한 연구)

  • 박근우;이경희
    • Journal of the Korean housing association
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    • v.11 no.2
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    • pp.129-137
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    • 2000
  • This study is about the difference of South and East facing Cooling load of Apartment s Houses using Dynamic Heat-flow Calculation. Therefore, the purpose of this study is come in to use Material for the Thermal Environments of Apartment Houses. The results of the analysis are below. (1) For the peak load of degree hour; The highest is "I" unit and the next high load is H, F, E, C, B, G, D and A unit for the south facing Apartment houses. The higher load is "H" unit and the next high load is I, E, F, B, C, G, D, A Unit for the east facing Apartment houses. (2) For the total load of degree day; The highest load is "I" unit and the next high load is H, G, F, E, C, B, D and A Unit for the south facing Apartment houses. The highest load is "H" unit and the next high load is I, G, E, F, B, C, D, A Unit for the east facing Apartment houses. (3) For the total load of degree day; The highest load is "H" Unit for the east facing Apartment houses and the Lowest load is "A" Unit for the south facing Apartment houses.is "A" Unit for the south facing Apartment houses.nt houses.

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The analysis of NRT-SEL of the B747-400 Aircraft by FDR(Flight Data Recorder) (비행자료기록(FDR)에 의한 B747-400 항공기의 나리타-김포 비행 분석)

  • Shin, D.W.;Lee, K.C.;Lee, J.H.;Choi, H.S.;Song, B.H.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.9 no.2
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    • pp.63-76
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    • 2001
  • The number of civil aviation aircraft registered in Korea has continuously increased. Accordingly the accidents accompanying loss of human or economic resources occurred repeatedly. But the analysis of flight data recorded in FDR was not done by ourselves in the accident investigation because of lack of analysis technology. Therefore, this study is performed to secure the safety of civil aviation by establishing systematic analysis ability of Flight Data Recorder. Through this study, download flight data to personal computer, editing interface file to convert from binary data to engineering data, three dimensional graphical analysis and numerical analysis are performed. For the analysis, the flight of B747-400 model aircraft between Narita(Japan) and Gimpo(Korea) was selected.

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Analysis of Influence of Environmental Conditions on Ganoderic Acid Content: in Ganoderma lucidum Using Orthogonal Design

  • Li Na;Liu Xiao Hua;Zhou Jie;Li Yu Xiang;Zhao Ming Wen
    • Journal of Microbiology and Biotechnology
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    • v.16 no.12
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    • pp.1940-1946
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    • 2006
  • The influence of environmental conditions on the ganoderic acid (GA) content in the fungus Ganoderma lucidum was investigated using a one-factor-at-a-time design and orthogonal design. Among the various medium components examined, sucrose, soybean powder or peptone, ferrous sulfate, and pH 6.0 were the most suitable carbon source (factor A), nitrogen source (factor B), mineral source (factor C), and initial pH (factor D), respectively, for the GA content in the one-factor-at-a-time design. According to the orthogonal design, the order of effect for the four factors on the GA content was A>C>D>B. The best level of factor A was $A_2$ (sucrose) with a value of +0.34 mg/100 mg DW. The optimal treatment combination was $A_2B_1C_3D_1$ with which the GA content reached up to 2.63$\pm$0.011 mg/100 mg DW. The interactions between the mineral ion and the nitrogen source, and the mineral ion and the pH were both highly significant (P<0.01). The highest interaction effect was ($B_2{\times}D_2$) with a value of +0.19 mg/100 mg DW, which was higher than the level effect value for $B_2$ (peptone) and D$_2$ (pH 5.0). Therefore, the results proved that interactions between factors cannot be ignored. The results also indicated the importance of the interactions between the factors, which may help to understand the metabolic pathway leading to triterpene biosynthesis and the expression and regulation of the key enzymes involved.

Analysis of Genetic Polymorphism by Bloodtyping in Jeju Horse (혈액형에 의한 제주말의 유전적 다형성 분석)

  • Cho Gil-Jae
    • Journal of Life Science
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    • v.15 no.6 s.73
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    • pp.972-978
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    • 2005
  • The present study was carried out to investigate the blood markers of Jeju horses. The redcell cypes (blood groups) and blood protein types (biochemical polymorphisms) were tested from 102 Jeju horses by serological and electrophoretc procedure, and their phenotypes and gene frequencies were estimated. The blood group and biochemical polymorphism phenotypes observed with high frequency were $A^{af}\;(27.45\%$), $C^{a}\;(99.02\%$), $K^{-}\;(97.06\%$), $U^{a}\;(62.75\%$), $P^{b}\;(36.27\%$), $Q^{c}\;(47.06\%$), $D^{cgm/dghm}\;(13.73\%$), $D^{adn/cgm}\;(9.80\%$), $D^{ad/cgm}$\;(8.82\%$), $D^{dghm/dghm}(7.84\%$), $D^{cgm/cgm}(7.84\%$), $AL^{B}\;(48.04\%$), $GC^{F}\;(99.02\%$), $AlB^{K}\;(97.06\%$), $ES^{FI}\;(36.27\%$), $TF^{F2}\;(25.49\%$), $HB^{B1}\;(45.10\%$), and $PGD^{F}\;(86.27\%$) in Jeju horses, respectively. Alleles observed with high gene frequency were $A^{af}$ (0.3726), $A^{C}$ (0.2647), $C^{-}$ (0.5050), $K^{-}$ (0.9853), $U^{-}$ (0.6863), $P^{b}$ (0.4657), $Q^{c}$ (0.5294), $D^{cgm}$ (0.3039), $HB^{B1}$(0.6863), $PGD^{F}$ (0.9265), $AL^{B}$ (0.6912), $ALB^{K}$ (0.9852), $GC^{F}$ (0.9950), $ES^{I}$ (0.5000) and $TF^{F2}$ (0.4950) in Jeju horses, and sfecific alleles, $D^{cgm(f)}$ (0.0196), $HB^{A}$ (0.0147), $HB^{A2}$ (0.0196), $ES^{G}$ (0.0441), $ES^{H}$ (0.0098), $TF^{E}$TF'(0.0246), $TF^{H2}$ (0.0049) and $PGD^{D}$ (0.0098) were detected in Jeju horses. These preliminary results present basic information for detecting the genetic markers in Jeju horse. and developing a system for parentage verification and individuals identification in jeju horses.

Extrapolating B-H Curve Data using Common Electrical Steel Characteristics for High Magnetic Saturation Applications

  • Chai, Seung-Hee;Kim, Ji-Hyun;Kim, Sung-Il;Hong, Jung-Pyo
    • Journal of Magnetics
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    • v.20 no.3
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    • pp.258-264
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    • 2015
  • In this paper, an adequate B-H curve extrapolation method is proposed and its reliability is verified through experiments. A method is developed to estimate the magnetic saturation induction from the density of the lamination core and electrical resistivity. The magnetic saturation induction of electrical steels measured using a vibration sample magnetometer are compared with the analytical results to validate the accuracy of the proposed estimation method. It is found that the predicted error in the magnetic saturation induction of the electrical steels are approximately 1.2% when the proposed method is used. The performance of interior permanent magnet synchronous motors that applies the proposed method are evaluated via 2D nonlinear finite element analysis and through experiments. Based on the obtained results, the extrapolated B-H curves from the estimated saturation induction can be used for various analyses in saturation region.