Abstract: This invention relates to information operation carried out between information processing apparatuses such as computer, etc. mutually connected through network such as internet, etc. More particularly, this invention relates to an information picture utilization system where there is used “information picture” in which picture information and related information for causing an operator to carry out a predetermined operation on the basis of the picture information are caused to be one handling unit, and a system for allowing notification to server carried out when processing operation based on related information included in information picture is carried out to have lifetime to thereby realize lowering of communications traffic taking place when information pictures are distributed and duplications are increased with time.

Abstract: The present invention relates to a system having an information image management server, an advertising agency terminal and a client computer connected with one another via a network, in which the information image management server extracted a client computer which meets a client specifying condition on the basis of client specifying condition information from the advertising agency terminal, then a message to carry out update or addition of an information image recorded in a management area of the extracted client computer is transmitted to the extracted client, and the client computer which has received the message carries out update or addition of an information image in accordance with the message.

Abstract: The present invention relates to a system having an information image management server, an advertising agency terminal and a client computer connected with one another via a network, in which the information image management server extracted a client computer which meets a client specifying condition on the basis of client specifying condition information from the advertising agency terminal, then a message to carry out update or addition of an information image recorded in a management area of the extracted client computer is transmitted to the extracted client, and the client computer which has received the message carries out update or addition of an information image in accordance with the message.

Abstract: This invention relates to information operation carried out between information processing apparatuses such as computer, etc. mutually connected through network such as internet, etc. More particularly, this invention relates to an information picture utilization system where there is used “information picture” in which picture information and related information for causing an operator to carry out a predetermined operation on the basis of the picture information are caused to be one handling unit, and a system for allowing notification to server carried out when processing operation based on related information included in information picture is carried out to have lifetime to thereby realize lowering of communications traffic taking place when information pictures are distributed and duplications are increased with time.

Abstract: Light to be measured is input to a diffraction grating after is has been oscillated by a wavelength modulation device with a constant frequency F. The light is incident to the diffraction grating at an angle of incidence, .theta., and is oscillated with a frequency F with a center angle of incidence, .theta..sub.0, as a center. An output spectrum of said diffraction grating is received by a photoelectric converter. An electric signal from the photoelectric converter is oscillated with a frequency F over a wavelength range of .lambda..sub.0 .+-..DELTA..lambda. where .lambda..sub.0 is a center wavelength measured at the center angle of incidence .theta..sub.0. The oscillated spectrum signal is synchronously detected, by a synchronous detector, with a frequency 2F through a high-pass filter, obtaining a variation spectrum at the measured center wavelength .lambda..sub.0.