A method of optimizing a sampling period for a system having at least one measurable system parameter z, includes calculating a probability distribution function f. The variety successfully propagates from softwood cuttings and is suitable for cultivation commercial nursery culture. Thus, this apparatus can output images and sound without interruption. Configuration information may specify performance of tracing or usage tracking. , TaN, NbN, HfN, ZrN, WN, W2N, TiN, TiSiN, TiAlN, TaSiN, or NbAlN, or double or triple layers of such materials, e.