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

Search Result 1,378, Processing Time 0.05 seconds

Studies on the Analysis of Stand Structure Korean Red Pine (Pinus densiflora) (소나무림(林)의 임분구조(林分構造) 해석(解析)에 관(關)한 연구(硏究))

  • Yun, Jong Wha;Kim, Ju Cheon
    • Journal of Korean Society of Forest Science
    • /
    • v.83 no.2
    • /
    • pp.254-261
    • /
    • 1994

  • This study was conducted to investigate and interpret the stand structure of Korean Red pine (Pinus densiflora) stands in Kangwon province, so as to provide basics information for effective forest management. The results obtained in this study were as follows : 1. Number of trees distribution for each diameter class have left nonsymmetrical in Gosung districts, but symmetrical distribution in Pyungchang districts. 2. Height curve for D.B.H. Distribution becames liner shape in Pyungchang districts that more higher than Gosung districts. 3. Stand volume and number of trees per ha in Pyungchang districts are higher than Gosung districts. 4. D.B.H. growth increments during recent 5 years at large D.B.H. class has much lager than low D.B.H. class. 5. Total growth increments of D.B.H., height and volume in Pyungchang districts are or the higher than Gosung districts overtimes 15 years later.

  • PDF

A Study of Improved Convergence on the Preisach Model Method by Using M-B Variables (M-B 변수를 이용한 Preisach 모델링의 수렴성 향상에 관한 연구)

  • Won, Hyuk;Park, Gwan-Soo;Chung, Hyun-Ju;Yang, Chang-Seob
    • Journal of the Korean Magnetics Society
    • /
    • v.21 no.1
    • /
    • pp.15-22
    • /
    • 2011

  • It is necessary to describe the hysteresis characteristics of magnetic material precisely for the analysis or design of system with ferromagnetic materials. Although Preisach model is regarded as the most accurate method to describe the hysteresis characteristics, it is not widely applied to the real systems because of some difficulties. The conventional Preisach model shows the numerical instabilities during the iterative computations because the density distribution obtained from the sets of M-H curves are strongly localized. To remove such numerical instabilities, M-B instead of M-H is adopted as an implementation variable in normal Preisach modeling. The two dimensional computations with hysteresis characteristics by using normal Preisach modeling are tested and the result showed that the modeling by using M-B variables showed better stabilities than M-H variables.

  • https://doi.org/10.4283/JKMS.2011.21.1.015 인용 PDF KSCI

Analysis of Higher Order Structure of 5S rRNA from Xanthomonas celebensis by Using Angiogenin (안지오제닌을 이용한 Xanthomonas celebensis 5S rRNA의 고차원 구조 분석)

  • Kim, Sang Beom;Jo, Bong Rae;Im, Ja Hye;Jang, Su Ik;Park, In Won
    • Journal of the Korean Chemical Society
    • /
    • v.38 no.10
    • /
    • pp.769-773
    • /
    • 1994

  • Higher order structure of 5S rRNA isolated from Xanthomonas celebensis was examined using angiogenic extracted from milk. Angiogenin cleaved exclusively 3' P-O bonds on the far sides of pyrimidines in the single-stranded sequences of 5S rRNA. Whereas angiogenin acted only on the loop d of 5S rRNA at pH 7.0 in the presence of 10 mM $Mg^{2+}$, it acted on all the loops (a, b, c and d) except loop e in the absence of $Mg^{2+}$. In the absence of $Mg^{2+}$, bonds $U_{74}$-$G_{75}$, $U_{77}$-$A_{78}$ and $U_{103}$-$A_{104}$ were highly susceptible to the action of angiogenin both at pH 7.0 and at pH 3.5. On the other hand, at pH 3.5 in the absence of $Mg^{2+}$ angiogenin strongly cleaved the bond $C_{17}$-$G_{18}$ of loop a and the bond $U_{55}$-$G_{56}$ of loop b. The results lead us to the following conclusion. First, angiogenin can be used as one of the probes for the tertiary structure analysis of 5S rRNA. Second, the structure of loop d of 5S rRNA is variable depending on the concentrations of $Mg^{2+}$ and $H^{1+}$.

  • PDF

Stress Analysis of IPS Lower bracket

  • Lee, J.M.;Park, K.N.;Chi, D.Y.;Park, S.K.;Sim, B.S.;Lee, H.H.;Ahn, S.H.;Lee, C.Y.;Kim, H.R.
    • Proceedings of the Korean Nuclear Society Conference
    • /
    • 2005.10a
    • /
    • pp.703-704
    • /
    • 2005

  • PDF

The Possibility of TBC1D21 as a Candidate Gene for Teat Numbers in Pigs

  • Jin, S.;Lee, J.B.;Kang, K.;Yoo, C.K.;Kim, B.M.;Park, H.B.;Lim, H.T.;Cho, I.C.;Maharani, D.;Lee, J.H.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.26 no.10
    • /
    • pp.1374-1378
    • /
    • 2013

  • Based on a quantitative traits locus (QTL) study using a $F_2$ intercross between Landrace and Korean native pigs, a significant QTL affecting teat numbers in SSC7 was identified. The strong positional candidate gene, TBC1D21, was selected due to its biological function for epithelial mesenchymal cell development. Sequence analysis revealed six single nucleotide polymorphisms (SNPs) in the TBC1D21 gene. Among these, two SNP markers, one silent mutation (SNP01) for g.13,050A>G and one missense mutation (SNP04) for c.829A>T (S277C), were genotyped and they showed significant associations with teat number traits (p value = 6.38E-05 for SNP01 and p value = 1.06E-07 for SNP04 with total teat numbers). Further functional validation of these SNPs could give valuable information for understanding the teat number variation in pigs.

  • https://doi.org/10.5713/ajas.2013.13140 인용 PDF KSCI