def __init__(self, **kwargs):
        """Initialize module."""
        super(RProcess, self).__init__(**kwargs)
        self._wants_dense = True
        barnes_v = np.asarray([0.1, 0.2, 0.3])
        barnes_M = np.asarray([1.e-3, 5.e-3, 1.e-2, 5.e-2])
        barnes_a = np.asarray([[2.01, 4.52, 8.16], [0.81, 1.9, 3.2], [
                              0.56, 1.31, 2.19], [.27, .55, .95]])
        barnes_b = np.asarray([[0.28, 0.62, 1.19], [0.19, 0.28, 0.45], [
                              0.17, 0.21, 0.31], [0.10, 0.13, 0.15]])
        barnes_d = np.asarray([[1.12, 1.39, 1.52], [0.86, 1.21, 1.39], [
                              0.74, 1.13, 1.32], [0.6, 0.9, 1.13]])

        self.therm_func_a = RegularGridInterpolator(
            (barnes_M, barnes_v), barnes_a, bounds_error=False, fill_value=None)
        self.therm_func_b = RegularGridInterpolator(
            (barnes_M, barnes_v), barnes_b, bounds_error=False, fill_value=None)
        self.therm_func_d = RegularGridInterpolator(
            (barnes_M, barnes_v), barnes_d, bounds_error=False, fill_value=None)