An apparatus for measuring soil stability of a test surface comprising a housing defining an interior chamber, the housing having an open bottom wherein the housing is configured to be placed over the test surface proximate the open bottom. Interference information can be generated by a base station by evaluating uplink conditions, and disparate interference information can be collected from neighbor base station. A polymeric film is then adhered to the formed layer. The soft magnetic film can achieve a corrosive resistant magnetic head with a high recording density. The transparent display window, the housing and the buttons can be molded on the inner surface of the external pad by injecting synthetic resins onto each of placing portions thereof. Inorganic substrates, such as concrete, stone, and ceramic materials, with such a composition on their surfaces are also disclosed, as are methods for polishing and protecting inorganic substrates.