• 제목/요약/키워드: J-state

검색결과 3,141건 처리시간 0.032초

STUDY OF SUPERHUMPS IN THE RECENTLY DISCOVERED SU UMA DWARF NOVAE

  • VOLOSHINA, I.;KHRUZINA, T.;METLOV, V.
    • 천문학논총
    • /
    • 제30권2호
    • /
    • pp.241-245
    • /
    • 2015
  • In this work we present the results of light curve analysis for two cataclysmic variables detected recently in the SDSS project: SDSS J090350.73+330036.1 and J150240.98+333423.9. Photometric observations of the first were obtained during a superoutburst in May 2010. Our observations clearly indicate the presence of superhumps in the light curves, suggesting SDSS J090350.73+330036.1 is an SU UMa dwarf nova. We determined the period of the superhumps. We also carried out fitting using a spiral-arm model in order to determine parameters of the accretion disk, hot line, and other components of this system. Photometric observations of the second, J150240.98+333423.9, were obtained during the post-maximum decline, during April-June 2012. Photometric variability of this system has been studied in an inactive state. We obtained its parameters via a combined model fitted to the observed light curves by ${\chi}^2$ minimization.

J-integral을 위한 용접부 파괴해석 (Fracture Analysis of Weldments Using the J-integral)

  • ;심용래
    • 한국해양공학회지
    • /
    • 제7권1호
    • /
    • pp.3-12
    • /
    • 1993
  • 용접부의 파괴특성을 J-적분을 이용하여 유한요소법으로 해석하였다. 용접부 의 열전달 해석 및 응력해석을 수행한후 crack을 도입하여 crack 주위의 자류응력 해석을 통하여 crack tip에서의 J- 적분치를 계산하였다. 이차원 및 삼차원에서의 파괴해석을 위한 modeling 과정을 소개하였으며 대표적인 계산결과를 소개하였다.

  • PDF

Development of a New Duplex Real-Time Polymerase Chain Reaction Assay for Detection of Dicer in G. gallus

  • Ji, Xiaolin;Wang, Qi;Gao, Yulong;Wang, Yongqiang;Qin, Liting;Qi, Xiaole;Gao, Honglei;Wang, Xiaomei
    • Journal of Microbiology and Biotechnology
    • /
    • 제23권5호
    • /
    • pp.630-636
    • /
    • 2013
  • Recently, there has been a growing body of evidence showing that cellular microRNAs (miRNAs) are involved in virus-host interactions. Numerous studies have focused on analyses of the expression profiles of cellular miRNAs, but the expression patterns of Dicer, which is responsible for the generation of miRNAs, have only rarely been explored in Gallus gallus. We developed a duplex real-time reverse transcriptase polymerase chain reaction (RT-PCR) assay for the relative quantification of the mRNAs of Dicer and ${\beta}$-actin in G. gallus. To apply this method, the expression of Dicer in avian cells after infection with avian leukosis virus subgroup J (ALV-J) was detected using our established duplex real-time RT-PCR. The duplex real-time RT-PCR assay is sufficiently sensitive, specific, accurate, reproducible, and cost-effective for the detection of Dicer in G. gallus. Furthermore, this study, for the first time, demonstrated that ALV-J can induce differential expression of Dicer mRNA in the ALV-J-infected cells.

SOLAR LOG GF VALUES IN THE INFRARED J AND H BANDS

  • STALIN C. S.;TRIVEDI CHETNA;SINHA K.;SAKWAL B. B.
    • 천문학회지
    • /
    • 제29권spc1호
    • /
    • pp.343-344
    • /
    • 1996
  • Solar IR spectra have been utilised by us to derive log gf values for atomic lines due to 17 chemical elements. in the J and H bands, i.e. in the wavelength ranges 1.00 - 1.34 ${\mu}m$ and 1.49 - 1.80 ${\mu}m$ respectively. The observed central line depths were based on the FTS atlases published at. Liege and KPNO. We also reprot new log gf values for 51 lines for which neither theoretical nor experimental values are available till date.

  • PDF

Isotherm for $Ni-O_2$ Adsorption System

  • Kyoung-Hee Ham;Woon-Sun Ahn
    • Bulletin of the Korean Chemical Society
    • /
    • 제11권3호
    • /
    • pp.231-235
    • /
    • 1990
  • The activation energy of dissociative adsorption of oxygen on polycrystalline nickel surface is calculated from adsorption isotherms obtained using X-ray photoelectron spectroscopy. Negative value of this activation energy (-5.9 kJ/mol) indicates that the adsorption takes place through an undissociated precursor state. An adsorption energy for this precursor state is calculated assuming the precursor state as a moleculary physisorbed state ($E_{ad}$ = -7.9 kJ/mol). Finally, an adsorption isotherm equation is derived as a function of the gas exposure, which agrees with the experimental isotherms reasonably good.