Systems and methods are provided to coordinate experiences between related applications in a graphical user interface. Thereby, the user can recognize that which musical composition is frequently broadcasted. An adhesive, such as a silica-forming agent and silicon powder, coat the keyway structure before assembly and is cured after assembly, so as to bond the staves together. Outer surfaces of the first retaining wall and the second retaining wall are exposed out of the reflector. The light shielding means 63 is structured such as to limit the incoming radiation of the external light via the insertion port 43 after starting the insertion of the analytical tool 20 to the installation portion before the light measurement of the analytical tool 20 is finished in the light measuring mechanism 22 and 23.