Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
권호 표지
DOI QR코드

DOI QR Code

Cross Correlation Analysis of Gamma Exposure Rates and Rainfall, Hours of Saylight, Average Wind Speed in Gangneung Area

강릉 지역 공간 감마선량률과 강수량, 일조시간, 평균풍속 사이 교차 상관성 분석

  • Cha, Hohwan (Department of Physics, Gangneung-Wonju National University) ;
  • Kim, Jaehwa (Department of Physics, Gangneung-Wonju National University)
  • 차호환 (강릉원주대학교 물리학과) ;
  • 김재화 (강릉원주대학교 물리학과)
  • Received : 2013.09.17
  • Accepted : 2013.10.25
  • Published : 2013.10.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we analyze the cross correlation between Gamma exposure rates and Rainfall, Hours of daylight, Average wind speed using cross-correlation coefficient ${\rho}_{DCCA}$ and DCCA cross-correlation coefficient(DCCA ${\rho}$) method. Our data are measured simultaneous in Gangneung regional. First, we find the ${\rho}_{DCCA}$ between Gamma exposure rates and Rainfall is Day(3~7days) 0.57~0.48, Month(30days) 0.39, Season(90days) 0.34, Year(360days) 0.26, between Gamma exposure rates and Hours of daylight is Day -0.20~-0.23, Month -0.22, Season -0.17, Year -0.13, between Gamma exposure rates and Average wind speed is Day -0.10~-0.12, Month -0.11, Season -0.05, Year -0.05. Second, our finding is cross- correlation between Gamma exposure rates and Rainfall, is no cross-correlation between Gamma exposure rates and Hours of daylight, Average wind speed.

본 논문은 강릉 지역에서 동일 기간에 기록된 공간 감마선량률과 강수량, 일조시간, 평균풍속 사이의 교차 상관 지수 ${\rho}_{DCCA}$를 DCCA cross-correlation coefficient(DCCA ${\rho}$)방법으로 구하여 교차 상관성을 분석하였다. 우리는 이 연구를 통해 다음의 사실을 알았다. 첫 번째, 공간 감마선량률과 강수량 사이 ${\rho}_{DCCA}$는 일(4~7일), 달(30일), 계절(90일), 년(360일)에서 0.57~0.48, 0.39, 0.34, 0.26, 공간 감마선량률과 일조시간 사이 ${\rho}_{DCCA}$는 일, 달, 계절, 년에서 -0.20~-0.23, -0.22, -0.17, -0.13, 공간 감마선량률과 평균풍속 사이의 ${\rho}_{DCCA}$는 일, 달, 계절, 년에서 -0.10~-0.12, -0.11, -0.05, -0.05이다. 두 번째, ${\rho}_{DCCA}$를 통하여 공간 감마선량률과 강수량은 교차 상관성이 있으며 공간 감마선량률과 일조시간, 평균풍속 사이에는 교차 상관성이 없다는 것을 확인하였다.

Keywords

References

  1. J. Feder, Fractals, Plenum Press, New York, 1988.
  2. M. F. Barnsley, Fractals everywhere, Academic Press, 1993.
  3. A. Bunde and S. Havlin, Fractals in Science, Springer, Berlin, 1994.
  4. B. Podobnik, Z.-Q. Jiang, W.-X. Zhou and H. E. Stanley, Statistical tests for power-law cross-correlated processes, Phys. Rev. E, Vol 84, No 066118, 2011. https://doi.org/10.1103/PhysRevE.84.066118
  5. B. Podobnik and H. E. Stanley, Detrended cross-correlation analysis : A new method for analyzing two nonstationary time series, Phys. Rev. Lett., Vol 100, No 084102, 2008. https://doi.org/10.1103/PhysRevLett.100.084102
  6. D. Horvatic, H. E. Stanley and B. Podobnik, Detrended cross-correlation analysis for non-stationary time series with periodic trends, Europhys. Lett., Vol 94, No 18007, 2011. https://doi.org/10.1209/0295-5075/94/18007
  7. G. F. Zebende, DCCA cross-correlation coefficient, quantifying level of cross-correlation, Physica A, Vol 390, No 614, 2011.
  8. R.T. Vassoler and G.F. Zebende, DCCA cross-correlation coefficient : Quantifying level of cross-correlation, Physica A, Vol 391, No 2438, 2012.
  9. C.-K. Peng, S. V. Buldyrev, S. Havlin, M. Simons, H. E. Stanley and A. L. Goldberger, Mosaic organization of DNA nucleotides, Phys. Rev. E, vol 49, No 1685, 1994.
  10. G. Lim, K. Kim, J.-K. P and K.-H. C, J. Dynamical Analyses of the Time Series for the Temperature and the Humidity, Korean Phys. Soc., Vol 62, No 193, 2013.
  11. Hohwan Cha, Jaehwa Kim, Time Series Analysis of Gamma exposure rates in Gangneung Area, Journal of the Korean Society of Radiology, Vol 7, No 1, 2013.
  12. Minsun Yu, Jaeseung Lee, Inchul Im, Evaluation of Approximate Exposure to Low-dose Ionizing radiation from Medical Images using a computed Radiography (CR) System, Journal of the Korean Society of Radiology, Vol 6, No 6, 2012.
  13. Kyotae Kim, Sangsik Kang, Sicheul Noh, Bongjae Jung, Changhoon Cho, Yeji Heo, Jikoon Park, Absorbed Spectrum Comparison of Lead and Tungsten in Continuous X-ray Energy using Monte Carlo Simulation, Journal of the Korean Society of Radiology, Vol 6, No 6, 2012.
  14. http://www.kma.go.kr/