Abstract: A biogas production system is to produce biogas using, as raw materials, waste water-soluble coolants collected from machining devices that perform cutting or grinding. The biogas production system includes a plurality of storage tanks to separate by type and store the waste water-soluble coolants collected from the machining devices; concentration measuring units to measure concentrations of the waste water-soluble coolants in the storage tanks; a mixing device to prepare a coolant mixture containing a plurality of the waste water-soluble coolants by mixing the waste water-soluble coolants in the storage tanks at a ratio calculated based on the concentrations of the waste water-soluble coolants; and a fermentation device to produce the biogas by fermenting the coolant mixture supplied from the mixing device using microorganisms.

Abstract: An additive manufacturing apparatus includes heating devices configured to heat layered metal powder composed of an alloy tool steel to a temperature equal to or higher than 150° C. and lower than a melting point, and a light beam radiation device configured to radiate a light beam onto the metal powder heated to the temperature equal to or higher than 150° C. and lower than the melting point by the heating devices to melt the metal powder and form a shaped article. The light beam is radiated in a range narrower than a heating range of the heating devices.

Abstract: The information display system receives a search condition for searching for facilities from a user, and obtains an attribute and/or a current situation of the user. Next, the information display system searches for facilities based on the search condition, an attribute and/or a current situation of the user, and outputs facility information relevant to the facilities. Then, the information display system obtains additional information for the facilities, and displays the additional image indicating the additional information, together with the facility information.

Abstract: An additively shaped article manufacturing method includes: a first step of feeding a plurality of base material particles and a plurality of microparticles both constituting metal powder to an irradiation area of a shaping optical beam; and a second step of applying the shaping optical beam to the microparticles and respective irradiated surfaces that are respective surfaces of the base material particles on a side to be irradiated with the shaping optical beam. The microparticles are formed of a metal identical in type to the base material particles and have an average volume smaller than the average volume of the base material particles. The microparticles fed to the irradiation area at the first step are arranged to be in contact with the respective irradiated surfaces of the base material particles.