def thean
      array = Array.new(10)

      array[0] = 1.772E+00
      array[1] = 5.774E-01
      array[2] = 6.743E-02
      array[3] = 6.214E-03
      array[4] = 4.739E-04
      array[5] = 4.810E-05
      array[6] = 5.344E-06
      array[7] = 5.716E-07
      array[8] = 1.036E-07
      array[9] = 2.959E-08
      array[10] = 7.585E-10

      array
    end
def thean
      array = Array.new(10)

      array[0] = 1.772E+00
      array[1] = 5.774E-01
      array[2] = 6.743E-02
      array[3] = 6.214E-03
      array[4] = 4.739E-04
      array[5] = 4.810E-05
      array[6] = 5.344E-06
      array[7] = 5.716E-07
      array[8] = 1.036E-07
      array[9] = 2.959E-08
      array[10] = 7.585E-10

      array
    end
thean is an in ANS/ANSI-5.1-1973.