Abstract: A fish counting system has: an image acquisition unit for acquiring a plurality of images wherein a fluid containing fish is imaged over time; a counting unit for counting the fish on the basis of the plurality of images; a fish count change display provision unit for providing a fish count change display, wherein a display corresponding to the number of fish counted per unit time is arranged in a time-series manner; a result provision unit for providing a counting result display wherein an image to which count completion marks indicating a counted fish have been added; and a correction unit for receiving a correction operation and correcting the number of fish.

Abstract: A wiring board includes a base material, a through hole that is formed in the base material, a magnetic member that is embedded in the through hole, and a plating film that covers end faces of the magnetic member exposed from the through hole. The magnetic member includes a conductor wire that is covered by a magnetic body. A wiring board manufacturing method includes forming a through hole in a base material, forming a magnetic member by covering a conductor wire by a magnetic body, embedding the magnetic member in the through hole, and forming a plating film that covers end faces of the magnetic member exposed from the through hole.

Abstract: A program recorded on a computer-readable recording medium causes a processor of a game apparatus to function as a game controller that executes a video game and generates video information indicative of a video of the video game; and an acquirer that acquires message information that is output from a terminal apparatus configured to display a distributed video that is based on the video information, the message information including a message related to at least one of the distributed video or the video game. The game controller incorporates the message included in the message information into the video of the video game, based on progress status information indicative of a progress status of the video game.

Abstract: A watching system by which a game video is distributed to display devices of a plurality of watching users has: a computer; the computer accepting viewer operations by the plurality of watching users; the computer evaluating a mutual relationship of input of the viewer operation by each of the plurality of watching users; and the computer controlling an operation effect corresponding to the viewer operation so as to change based on evaluation result of the mutual relationship.

Abstract: A male rotor of a screw compressor has a cooling flow path extending in an axial direction inside a discharge-side shaft section. A groove structure is provided at at least a part of a region on a wall surface of the cooling flow path between the position of a discharge-side end face of the male rotor and a mounting position of a discharge-side bearing. The groove structure includes grooves or a groove that has a lengthwise component in a circumferential direction of the screw rotor and that are spaced apart in the axial direction. A nozzle which is a stationary member is arranged inside the cooling flow path with a gap between the nozzle and the wall surface of the cooling flow path. The nozzle is arranged in such a manner as to overlap at least a part of the groove structure in the axial direction.

Abstract: An electron beam device includes a Schottky emitter that is capable of reproducing collapse of a shape of a facet in a short time without adding hardware. Also, a method of operating a Schottky emitter includes applying a first electric field to the Schottky emitter while heating the Schottky emitter at a first temperature, and then applying a second electric field to the Schottky emitter while heating the Schottky emitter at a second temperature. The first temperature is higher than an operation temperature of the Schottky emitter and the second temperature. The first electric field is equal to or higher than an operation electric field of the Schottky emitter and lower than the second electric field. The second temperature is equal to or higher than the operation temperature and lower than the first temperature. The second electric field is higher than the operation electric field and the first electric field.

Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.

Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.

Abstract: A display device is used for a number-of-fish counting system for counting the number of fish. The display device is provided with a display unit that displays a plurality of selectable instruction items on a main screen. The plurality of instruction items include a recording instruction item that instructs a processing device of the number-of-fish counting system to execute or stop recording of video of fish, and an analysis instruction item that instructs the processing device to count the number of the fish by analyzing the fish on the basis of the recorded video.

Abstract: A laser welding method includes: forming a molten weld pool by emitting laser light including a main power region and a sub-power region onto a workpiece, the main power region including at least one main beam, the sub-power region including at least one sub-beam having a lower power density than power density of the main beam; and solidifying the molten weld pool. The sub-beam is emitted onto the workpiece such that a void formed inside the molten weld pool escapes to outside of the molten weld pool before the molten weld pool becomes solidified.

Abstract: A laser cutting method for metal foil includes: cutting a processing target by laser by intermittently applying a pulse of laser beam to a surface of a metal foil serving as the processing target at a frequency of 1 [MHz] or less.

Abstract: A welding method includes: irradiating a plurality of metal foils stacked on a first surface of a metal member in a first direction with laser light to weld the metal member and the plurality of metal foils to each other, the laser light including first laser light having a wavelength of 800 [nm] or more and 1200 [nm] or less and second laser light having a wavelength of 550 [nm] or less, a second surface of a metal foil farthest from the metal member in the first direction among the plurality of metal foils, on a side opposite to the metal member, being irradiated with the laser light.

Abstract: A welding method includes: emitting a laser beam to a workpiece including a metal; and welding a portion of the workpiece to which the laser beam is emitted by melting. The laser beam includes a main power region and at least one auxiliary power region, power in the main power region is equal to or higher than power in each of the at least one auxiliary power region, and a power ratio of the power in the main power region and a total of the power in the at least one auxiliary power region is within a range of 144:1 to 1:1.

Abstract: A fish counting system has: an image acquisition unit for acquiring a plurality of images wherein a fluid containing fish is imaged over time; a counting unit for counting the fish on the basis of the plurality of images; a fish count change display provision unit for providing a fish count change display, wherein a display corresponding to the number of fish counted per unit time is arranged in a time-series manner; a result provision unit for providing a counting result display wherein an image to which count completion marks indicating a counted fish have been added; and a correction unit for receiving a correction operation and correcting the number of fish.

Abstract: This fish counting system comprises: an image acquisition unit configured to acquire a plurality of images obtained by capturing, over time, images of a photographing area in which a fluid including a fish flows; an extraction unit configured to extract a fish in each image; and a counting unit configured to count the number of fish. The photographing area has a first area and a second area. The counting unit is configured to count the fish when the fish in the first area moves to the second area.

Abstract: A welding method includes a step of, while irradiating laser beam toward a workpiece, relatively moving the laser beam and the workpiece and, while sweeping the laser beam on the workpiece, melting the workpiece in an irradiated portion to perform welding. Further, the laser beam is configured by a main power region and a sub-power region, at least a part of the sub-power region is present on a sweeping direction side of the main power region, a power density of the main power region is equal to or higher than a power density of the sub-power region, and the power density of the main power region is at least power density that can generate a keyhole.

Abstract: A welding method includes: arranging a workpiece containing copper in a region to be irradiated with laser light; and irradiating the workpiece with the laser light to melt and weld an irradiated portion of the workpiece. Further, the laser light is formed of a main beam and a plurality of sub beams, and a ratio of power of the main beam to total power of the plurality of sub beams is 72:1 to 3:7.

Abstract: A welding method includes: forming a workpiece by stacking plated sheet members having a plating layer formed on a surface of a base material; disposing the workpiece in an area to be irradiated with laser light; irradiating a surface of the workpiece with a plurality of beams by dispersing positions such that centers of the beams do not overlap with each other within a prescribed area on the surface; while continuing the irradiation, relatively moving the beams and the workpiece and sweeping the beams on the workpiece so as to melt an irradiated part of the workpiece for performing welding; and setting a distance between the beams to be emitted such that weld pools formed in the workpiece by irradiation of each of the beams overlap with each other.

Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.

Abstract: In order to provide a thermionic emission filament capable of ensuring a long life and improving an analysis accuracy of a mass spectrometer using the thermionic emission filament, in the thermionic emission filament including a core member through which electric current flows and an electron emitting layer which is formed so as to cover a surface of the core member, the electron emitting layer is configured to have denseness for substantial gas-tight integrity.