Abstract: The present invention aims at providing a mobile terminal device that is capable of improving user's convenience in checking a utilization history of services that utilize a noncontact IC card function. A mobile terminal device of the present invention into which a noncontact IC 2 that is available in various services is installed, includes a controlling portion 1 for acquiring utilization conditions of various services stored in the noncontact IC 2 from the noncontact IC 2, a memory 4 for storing acquired utilization conditions of various services, a displaying portion 6 for outputting the utilization conditions of various services stored in the memory 4, and a sensing portion 3 for outputting a timing signal to the controlling portion 1 to acquire the utilization conditions of various services, wherein the controlling portion 1 acquires the utilization conditions of various services stored in the noncontact IC 2 at a point of time when the timing signal is input from the sensing portion 3.

Abstract: Disclosed is an optical glass having high-refractivity and high-dispersion properties and having little coloring, said glass containing P2O5, Nb2O5 and TiO2 as glass components, containing Sb2O3 in an amount of over 0% by weight but not more than 1% by weight based on the total content of the glass components excluding Sb2O3, having a refractive index (nd) of 1.91 or more and an Abbe's number (?d) of 21 or less and having a light transmittance that comes to be 70% at a wavelength of 500 nm or less.

Abstract: A glass substrate having a high Young's modulus and high rigidity and being suitable particularly as a substrate that is required to have excellent surface smoothness, a high elastic modulus and a high expansion coefficient and which is for an information recording medium, the glass substrate having a surface having a center-line average roughness ratio, Rab/Raf, of 0.8 to 1, in which Raf is a center-line average roughness measured after the glass substrate is held in water having a temperature of 80° C. for 24 hours and Rab is a center-line average roughness Rab measured before the holding, and having a Young's modulus of 90 GPa or more, and an information recording medium having the glass substrate and having an information recording layer formed on the glass substrate.

Abstract: Disclosed is an optical glass having high-refractivity and high-dispersion properties and having little coloring, said glass containing P2O5, Nb2O5 and TiO2 as glass components, containing Sb2O3 in an amount of over 0% by weight but not more than 1% by weight based on the total content of the glass components excluding Sb2O3, having a refractive index (nd) of 1.91 or more and an Abbe's number (?d) of 21 or less and having a light transmittance that comes to be 70% at a wavelength of 500 nm or less.