Abstract: A server device includes: a first receiver to receive, from a settlement terminal, settlement identification information for identifying a settlement method by which the settlement terminal makes a settlement, and portable terminal identification information for identifying portable terminals located within a predetermined distance, the portable terminal identification information being included in a radio wave sent out, and intensity information representing a radio wave intensity of the radio wave received by the settlement terminal; a correlation unit to correlate the portable terminal identification information corresponding to the intensity information of the highest radio wave intensity received by the first receiver, with the settlement identification information; a memory controller to store, in a memory, settlement record information that correlates the settlement identification information with the portable terminal identification information; and an estimation unit to estimate a settlement method u

Abstract: According to one embodiment, a server device includes a first receiving means, a storing control means, an estimation means, and a transmitting means. The first receiving means receives settlement identification information for identifying a settlement method and portable terminal identification information for identifying a portable terminal. The storing control means stores settlement record information in which the settlement identification information and a plurality of pieces of the portable terminal identification information are correlated with each other in a storage unit. The estimation means estimates a probability that the settlement method is used for each portable terminal based on a plurality of pieces of the settlement record information stored in the storage unit. The transmission means transmits an estimation result by the estimation means.

Abstract: An adhesive comprising an aqueous emulsion of a copolymer containing an ethylene unit (A), a vinyl ester unit (B), and an acetoacetyl group-containing copolymerizable monomer unit (C) in a weight ratio of (A)/(B)/(C)=(5 to 70)/100/(0.1 to 10).