Abstract: The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is % Mg and the amount of Al is % Al, % Mg/% Al is 0.80 or more, and a metal structure in a total field of view of 25,000 ?m2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area % of a MgZn2 phase, 10 to 30 area % of an Al—Zn phase with a Zn content of 10% or more, 0 to 15 area % of an Al phase with a Zn content of less than 10%, and 25 area % or more of an Al/MgZn2/Zn ternary eutectic structure.

Abstract: The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is % Mg and the amount of Al is % Al, % Mg/% Al is 0.80 or more, and a metal structure in a total field of view of 25,000 ?m2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area % of a MgZn2 phase, 10 to 30 area % of an Al—Zn phase with a Zn content of 10% or more, 0 to 15 area % of an Al phase with a Zn content of less than 10%, and 25 area % or more of an Al/MgZn2/Zn ternary eutectic structure.

Abstract: A non-contact tonometer of the present invention quantitatively measures characteristic vibration of the cornea of an eyeball and measures a true ocular pressure utilizing this vibration, and comprises: an air flow spray unit (200) spraying an air flow (F) to a cornea (C) of an eye (E) to be examined and deforming the cornea; a cornea deformation amount measurement unit (300) measuring deformation of the cornea caused by the air flow spray unit along with elapsed time from the start of the air flow spray; a Fourier analysis unit (401) performing Fourier analysis on a relationship between a deformation amount of the cornea obtained by a cornea deformation detection unit and the elapsed time; an eyeball tissue characteristic frequency operation unit (402) obtaining an characteristic frequency of each constituent tissue of the eyeball based on a Fourier analysis result obtained by the Fourier analysis unit; and an ocular pressure operation unit (403) calculating an ocular pressure based on the characteristic fre

Abstract: A non-contact tonometer of the present invention quantitatively measures characteristic vibration of the cornea of an eyeball and measures a true ocular pressure utilizing this vibration, and comprises: an air flow spray unit (200) spraying an air flow (F) to a cornea (C) of an eye (E) to be examined and deforming the cornea; a cornea deformation amount measurement unit (300) measuring deformation of the cornea caused by the air flow spray unit along with elapsed time from the start of the air flow spray; a Fourier analysis unit (401) performing Fourier analysis on a relationship between a deformation amount of the cornea obtained by a cornea deformation detection unit and the elapsed time; an eyeball tissue characteristic frequency operation unit (402) obtaining an characteristic frequency of each constituent tissue of the eyeball based on a Fourier analysis result obtained by the Fourier analysis unit; and an ocular pressure operation unit (403) calculating an ocular pressure based on the characteristic fre

Abstract: Molten slag discharged from a metallurgical furnace and flowing down from a slag trough is atomized by air jet into a primary heat-exchanger of rotary cylindrical type and hot slag granules thus obtained and air are caused to pass in a co-current therethrough so as to exchange the heat of the slag to the air flow to obtain a primary hot blast, then the hot slag granules discharged from the primary heat-exchanger are supplied to a secondary heat-exchanger connected to the primary heat-exchanger where the hot slag granules are brought into contact with a counter flow of cold air supplied from outside the system, or with a counter flow of a mixture of the above cold air and a part of the primary hot blast exhausted from the primary heat exchanger to effect heat-exchange and to recover a secondary hot blast.

Abstract: A method for producing high-grade ferro-nickel containing 0.4 to 5% of sulfur directly from nickel-containing oxide ores which comprises adding at least one member selected from the group consisting of high-sulfur fuels, elemental sulfur, gypsum, pyrites, nickel sulfide ores, and high-sulfur waste material produced during desulfurization of steels and ferro alloys to the nickel-containing oxide ore to provide a sulfur addition of 0.1 - 3 kilogram per one ton of dry ore, treating the resultant mixture in a pre-reducing furnace or calcining furnace, and smelting the thus treated mixture in an electric furnace.