Abstract: A position management system 1 includes an identification information transmitting apparatus 10, a relay mobile terminal 20, and a management apparatus 30, wherein the identification information transmitting apparatus 10 includes a power generating unit 12, an identification side storage unit 13, and an identification side transmitting unit 14 that wirelessly transmits an identification side signal using the electric power generated by the power generating unit 12, wherein the relay mobile terminal 20 includes a terminal side communication unit 21 and a terminal side communication unit 21 that wirelessly transmits a relay side signal, and wherein the management apparatus 30 includes a management side communication unit 31 and a management side control unit 33 that is based on the relay side signal received by the management side communication unit 31.

Abstract: A position management system 1 includes an identification information transmitting apparatus 10, a relay mobile terminal 20, and a management apparatus 30, the identification information transmitting apparatus 10 is carried by a mover and includes a power generating unit 12 that generates electric power using environmental energy, an identification side storage unit 13 that stores transmitting apparatus identification information uniquely identifying the identification information transmitting apparatus 10, and an identification side transmitting unit 14 that wirelessly transmits an identification side signal including the transmitting apparatus identification information stored in the identification side storage unit 13 using the electric power generated by the power generating unit 12 when a transmission condition is satisfied, the relay mobile terminal 20 includes a terminal side communication unit 21 that receives the identification side signal transmitted from the identification information transmitting

Abstract: An information presentation system includes discrimination information transmission devices, a mobile terminal, and an information provision device and a provision side storage unit that mutually associates and stores terminal discrimination information of the mobile terminal that is the transmission destination of a transmitted target information signal, information for identifying target information included in the transmitted target information signal, information for identifying a target facility related to the target information, and transmission device discrimination information of the discrimination information transmission devices provided in the target facility, a provision side communication unit that receives a terminal side signal transmitted from a terminal side communication unit of the mobile terminal, and a provision side decision unit that decides whether the target information included in the transmitted target information signal is used by a user of the mobile terminal based on the transmis

Abstract: A light curable dental composition is provided. The composition comprises an ethylenic unsaturated compound and a light polymerization initiator. The light polymerization initiator is a combination of an .alpha.-diketone and a polyperoxy ester containing a benzophenone group and represented by the general formula (I) of: ##STR1## wherein R.sub.1 and R.sub.1 ' represent a tertiary alkyl group or a tertiary aralkyl group and R.sub.2 and R.sub.2 ' represent a hydrogen atom, a tertiary alkoxy group or a tertiary aralkyloxy group.

Abstract: A light curable dental liquid or paste comprises an ethylenic unsaturated monomer, a light polymerization initiator and an organic filler. The light polymerization initiator is a combination of an organic peroxide and a pyrylium salt compound of: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represents a hydrogen atom, an alkyl group and the like, X stands for an oxygen or sulfur atom and Y for an anionic functional group.

Abstract: A light curable dental composition is provided. The composition comprises an ethylenic unsaturated compound and a light polymerization initiator. The light polymerization initiator is selected from a combination of an organic peroxide and a pyrylium salt compound of: ##STR1## Wherein R.sub.1, R.sub.2, and R.sub.3 each represents a hydrogen atom, an alkyl group and the like, X stands for an oxygen or sulfur atom and Y for an anionic functional group; a polyperoxy ester containing a benzophenone group; and a combination the polyperoxy ester and an .alpha.-diketone.