A metal stud array packaging structure has a die pad with a die attached on it. In order to improve an overall throughput of the cellular network andor the spectral efficiency of transmission resources of the cellular network, the method further comprises\u2014assigning the second portion of said transmission resources to the pico base station for transmitting the radio signal using the second portion of said transmission resources. Because HTTP is inherently stateless, a back-end process operates a stateful environment by managing multiple modules. In the memory part, a correlation between the output value of the first light-receiving element and the output value of the second light-receiving element when light is emitted from the light source in a state where the sample is not present is stored. On the other hand, when a user who has received the business card 25 inputs identifying information 27 into the user computer 13, the user is able to acquire business card information 20, associated with identifying information 27, from the server computer 9.