A centralized Storage Area Network management system based on a distributed client-server architecture. The results are presented in terms of standard auscultatory findings. The drive signals involve a combination of two drive schemes to provide reflectances in different portions of the range. The coordinates of an unknown signature which include two dimensional space coordinates x and y covered by a writer’s writing instrument are also recorded. To achieve the object, there is provided a coating liquid including a white pigment, silane compounds, and a solvent and satisfying both of the following conditions: 0\u2266R2\u226620 ; and 0\u2266R4R3\u22663, wherein R2, R3, and R4 are the contents of bifunctional, trifunctional, and tetrafunctional silane compounds, respectively, in the total amount of the silane compounds.