Disclosed is tin characterized in that a sample of the tin after melting and casting has an \u03b1 dose of less than 0. The flat wiper has a longitudinal wiper blade, at least one longitudinal stiffening member, a longitudinal member for retaining the wiper blade and the stiffening member, a longitudinal streamlined portion having two terminal caps and a central mounting extending between the terminal caps and being connected thereto. Second operation mode is of converting DC power from the second terminal into DC power having a desired voltage to be output to first terminal. The apparatus includes a mechanism to track culprit sources at layer 2 and layer 3 through a multiplicative increment method. Certain physical limitations are inherent to the DSP architectures, such as the trade-off of on-board memory size vs. Other embodiments, aspects and feature are also disclosed.