Abstract: An object of the present invention is to provide a soundproof material having a practically useful high-level sound absorption coefficient that while maintaining thinness, and further having an expanded sound-absorbable frequency region. A means for solving the problem is a soundproof material comprising: a surface cover layer composed of a fiber material; a back-surface layer laminated onto the surface cover layer, and composed of a porous material with voids interconnected with each other; and a joining layer laminated between the surface cover layer and the back-surface layer, and composed of a joining material, wherein the fiber material has an average fiber diameter of 1 to 10 ?m and an air-permeation volume of 5 to 200 cm3/cm2·sec, and wherein the joining layer has a joint area percentage of 50 to 95% with respect to the entire surface where the surface cover layer and the back-surface layer face each other.

Abstract: Provided is a semiconductor device and a method of manufacturing a semiconductor device in which deterioration of energy loss is suppressed. The semiconductor device includes: a drift layer of a first conductivity type provided between a first main surface and a second main surface of a semiconductor substrate; and a field stop layer of the first conductivity type having an impurity concentration higher than that of the drift layer and provided between the drift layer and the second main surface. A net carrier concentration profile at room temperature of the field stop layer have at least one peak from the second main surface toward the first main surface. A hydrogen atom concentration profile of the field stop layer have at least two peaks from the second main surface toward the first main surface. The hydrogen atom concentration profile has more peaks than the net carrier concentration profile.

Abstract: A circuit board having electrodes has good thermal conductivity and excellent voltage resistance and a method of producing the same. The circuit board includes a first ceramic layer, a second ceramic layer laminated thereon, and a first metal layer between the ceramic layers. The circuit board has a metal layer existing zone between the ceramic layers, and a metal layer non-existing zone having no metal layer between the ceramic layers. The ceramic layers join in the metal layer non-existing zone, and the second ceramic layer is a porous boron nitride layer having voids filled with a thermosetting composition cured material. The method includes disposing a second ceramic sheet on a first laminate metal layer including a first ceramic layer and the first metal layer laminated thereon, and pressurizing under heating. The second ceramic sheet is a porous boron nitride sheet having voids filled with a thermosetting composition semi-cured material.

Abstract: A boron nitride particle having a shape in which a diameter gradually increases from one end toward the other end. A boron nitride particle including a plurality of portions each having a shape in which a diameter gradually increases from one end toward the other end, in which the plurality of portions bond to each other on the other end side.

Abstract: A sheet containing a resin and boron nitride particles each having a hollow part, in which the resin is filled into the hollow part of the boron nitride particles.

Abstract: In an electron source including a suppressor electrode having an opening at one end portion thereof in a direction along a central axis and an electron emission material having a distal end protruding from the opening, the suppressor electrode further includes a receding portion receding to a position farther from the distal end of the electron emission material than the opening in the direction along the central axis at a position in an outer peripheral direction than the opening, and at least a part of the receding portion is disposed within a diameter of 2810 ?m from a center of the opening. Accordingly, an electron source, an electron gun, and a charged particle beam device such as an electron microscope using the same, in which a machine difference in a device performance due to an axial shift between the electron emission material and the suppressor electrode is reduced, are implemented.

Abstract: A boron nitride particle having a shell part formed of boron nitride and a hollow part surrounded by the shell part, in which a density of the boron nitride on an inside of the shell part is higher than a density of the boron nitride on an outside of the shell part. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.

Abstract: A method for producing a boron nitride particle, including a step of disposing a mixture and a base material in a container formed of a carbon material, in which the mixture includes boron carbide and boric acid, and the base material is formed of a carbon material and a step of generating a boron nitride particle on the base material by heating and pressurization with a nitrogen atmosphere formed in the container. A boron nitride particle having a maximum length of 80 ?m or longer, and an aspect ratio of 1.5 or more.

Abstract: A boron nitride particle having a bent shape. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.

Abstract: A method for producing an aggregated boron nitride particle, containing: a nitriding step of nitriding a particle containing boron carbide to obtain a particle containing boron carbonitride; and a decarburizing step of decarburizing the particle containing boron carbonitride to obtain an aggregated boron nitride particle, wherein, in the nitriding step, nitriding is performed so that boron carbide remains inside the particle containing boron carbonitride, and wherein, in the decarburizing step, the boron carbide remaining inside the particle containing boron carbonitride is removed.

Abstract: A method of producing a resin sheet, including: mixing blocky boron nitride particles A, blocky boron nitride particles B, and a resin composition, and molding the resin composition to a sheet form and pressurizing the sheet form resin composition, the boron nitride primary particles a having a length in a shorter direction of 0.7 ?m or less, the boron nitride primary particles b having a length in a shorter direction of 1 ?m or more, the blocky boron nitride particles A having an average particle diameter of 30 ?m or more, the blocky boron nitride particles B having an average particle diameter that is smaller than the average particle diameter of the blocky boron nitride particles A, the compressive strengths ratio of the blocky boron nitride particles A to the blocky boron nitride particles B being 1.2 or more. Thus, the thermal conductivity of a resin sheet can be enhanced.

Abstract: A printing management apparatus includes a processor configured to acquire an order quantity being a quantity of paper required for printing, acquire a stock quantity for each attribute of paper, the stock quantity being a quantity of paper having at least one or more attributes in common with attributes of the paper which is required for the printing and is in stock by a printer, and, when the order quantity is greater than the stock quantity and a sum of at least two stock quantities is equal to or greater than the order quantity, display the printer as a printer capable of accepting an order.

Abstract: A printing management apparatus includes a processor configured to acquire an order quantity being a quantity of paper required for printing, acquire a stock quantity for each attribute of paper, the stock quantity being a quantity of paper having at least one or more attributes in common with attributes of the paper which is required for the printing and is in stock by a printer, and, when the order quantity is greater than the stock quantity and a sum of at least two stock quantities is equal to or greater than the order quantity, display the printer as a printer capable of accepting an order.

Abstract: A monitoring device includes a receiving unit, a processing unit, and an information providing unit. The receiving unit is configured to receive a first photoplethysmogram signal acquired by irradiating a body of a subject with a first light having a first wavelength, and a heartbeat signal corresponding to a heartbeat of the subject. The processing unit is configured to calculate a fundamental frequency of heart rate corresponding to a heart rate of the subject based on the heartbeat signal, and estimate a fundamental frequency of pulse rate of the subject by comparing the fundamental frequency of heart rate with a frequency component of the first photoplethysmogram signal. The information providing unit is configured to provide information acquired based on the fundamental frequency of pulse rate.

Abstract: A printing management apparatus includes a processor configured to acquire an order quantity being a quantity of paper required for printing, acquire a stock quantity for each attribute of paper, the stock quantity being a quantity of paper having at least one or more attributes in common with attributes of the paper which is required for the printing and is in stock by a printer, and, when the order quantity is greater than the stock quantity and a sum of at least two stock quantities is equal to or greater than the order quantity, display the printer as a printer capable of accepting an order.

Abstract: In the present invention, in an electromagnetic device that uses a coil current, such as a motor, an initial value of a desired coil current waveform is inputted, a magnetic field analysis is performed for the electromagnetic device, a power supply voltage waveform which is derived from a magnetic vector potential acquired from the analysis is calculated, and a circuit coupled magnetic field analysis is performed by using a fundamental waveform component of the calculated power supply voltage waveform, thereby providing a power supply voltage waveform calculation method and a circuit coupled magnetic field analysis method for obtaining a steady solution more quickly than in the conventional technique.

Abstract: An information processing apparatus includes a processor, and the processor is configured to: accept an order related to production and including objects and a quantity about at least one user; and change the quantity of the accepted order so that, of a resource used for the production of the objects, a portion which cannot be used for the production is not larger than a predetermined standard.