def METHOD_NAME(ph_in):
    ph = Phonopy(ph_in.supercell, supercell_matrix=[1, 1, 1])
    ph.force_constants = ph_in.force_constants
    born_elems = {
        s: ph_in.nac_params["born"][i] for i, s in enumerate(ph_in.primitive.symbols)
    }
    born = [born_elems[s] for s in ph_in.supercell.symbols]
    epsilon = ph_in.nac_params["dielectric"]
    factors = ph_in.nac_params["factor"]
    ph.nac_params = {"born": born, "factor": factors, "dielectric": epsilon}
    return ph