Abstract: A system using blockchain technology includes a plurality of nodes forming a network having a hierarchical structure and each managing a ledger. Each of the plurality of nodes is located, based on a performance of a corresponding one of the plurality of nodes, in a layer corresponding to the performance among a plurality of layers in the hierarchical structure.

Abstract: An observation device includes a microscope. The microscope includes an illumination light beam source, an illumination optical system, and an observation optical system forming an optical image of an observation target from reflected light beams obtained by reflection of illumination light beams by the observation target. The observation optical system includes a phase plate changing the phase of directly reflected light beams reflected on a reflection surface among the reflected light beams. Both the illumination optical system and the observation optical system are arranged under the observation target. The observation device includes an image pickup device photoelectrically converting the optical image obtained by the observation optical system to create image data of the observation target and a display device displaying the image data. The illumination light beam emitted from the illumination optical system is a collimated light beam.

Abstract: An optical fiber connection structure includes a first optical fiber and a second optical fiber each including plural cores and a cladding surrounding outer peripheries of the plural cores, the first optical fiber and the second optical fiber being connected to each other at end faces of the first optical fiber and the second optical fiber, arrangements of the plural cores of the first optical fiber and the second optical fiber matching each other at least partly.

Abstract: A vibration actuator includes: a movable body having: a disk-shaped magnet; a pair of magnetic parts fixed to both surfaces of the magnet; and a pair of spring stopper parts connected to the magnetic parts; a pair of elastic support parts connected to the spring stopper parts and configured to support the movable body; a fixing body configured to connect to the elastic support parts with a protection wall portion, a pair of annular coils and a magnetic shield disposed in this order at an outer circumferential side, and accommodate the movable body such that the movable body is capable of reciprocally vibrating in an axial direction; and a cylindrical resin case having, on a circumferential wall portion, an opening portion for wires for supplying power to the coils and configured to close upper and lower faces of the circumferential wall portion and accommodate the fixing body.

Abstract: A vibration actuator comprising: a fixing body having a wound coil; a movable body housed in the fixing body, having a magnet and a yoke, and supported such that it vibrates inside the coil; and a pair of end portion members disposed at end portions of the fixing body and configured not to contact the movable body in a normal vibration range of the movable body but to contact the movable body at a time of impact to regulate a movement range of the movable body; wherein, each of the pair of end portion members includes an interference region that abuts against the movable body at the time of impact and restricts the movement range of the movable body, and a vent hole region that is located on an outer peripheral side of the interference region and includes a plurality of vent holes arranged in a circumferential direction.

Abstract: A terminal (100) includes a start assist tool (120) that classifies, into multiple groups, multiple remote modules (400) including channels (CH) connected to production line devices (500) as control targets, sets, based on information about the groups, an operation mode of a remote module belonging to a specific group of the multiple groups to a first operation mode to perform operational checks, and forms an image to display an operation of the remote module belonging to a first group.

Abstract: An upper die having a reduced weight and sufficient rigidity. In a die which is used for a pressing machine including a lower die provided on a lower side in a height direction, an upper die provided on an upper side in the height direction, and a pressing mechanism that moves the upper die up and down, the die has a plurality of segments in which a concave portion partitioned by ribs is formed, on a rear surface side that is a side opposite to a processing surface.

Abstract: A transient voltage protection device comprises a pair of discharge electrodes opposing each other with a gap therebetween and a discharge inducing portion in contact with the pair of discharge electrodes. The discharge inducing portion comprises a ceramic component, metal particles, and pores discontinuously scattered. The pores have an average size of 0.05 ?m or more and 1.04 ?m or less.

Abstract: Provided is a ventilation system in which a silencer has a compact structure, a silencing property is ensured, and a pressure loss in the silencer is suppressed. The ventilation system of the present invention has a silencer disposed at an intermediate position of a ventilation path. In the silencer, a sound absorbing member surrounds a housing in which an in-housing ventilation path extending from an inlet opening to an outlet opening is provided. In addition, an upstream tube body that forms an upstream ventilation path on an upstream side of an inlet opening, a downstream tube body that forms a downstream ventilation path on a downstream side of an outlet opening, a tubular first connecting portion that is connected to the upstream tube body and that links the upstream ventilation path and the inlet opening to each other, and a tubular second connecting portion that is connected to the downstream tube body and that links the downstream ventilation path and the outlet opening to each other are provided.

Abstract: An object is to provide a ventilation system that can suppress generation of a pressure loss and wind noise in a silencer. The ventilation system of the present invention has the silencer disposed at an intermediate position of a ventilation path. In a housing of the silencer, an in-housing ventilation path extending from an inlet opening to an outlet opening is surrounded by a sound absorbing member. The ventilation path has a first ventilation path that is adjacent to the inlet opening and that is continuous to the in-housing ventilation path and a second ventilation path that is adjacent to the outlet opening and that is continuous to the in-housing ventilation path. The farther from the in-housing ventilation path, the smaller a size of a cross section of at least one ventilation path of the first ventilation path or the second ventilation path.

Abstract: Provided is an air passage type silencer that can drain water from the inside of an expansion portion and that can suppress generation of a wind noise.

Abstract: The present invention provides a management method that manages a plurality of worksites, comprising: acknowledging a work status of each worksite per work type based on information obtained from a plurality of types of work machines at each worksite; comparing the work status with a plan, and managing a progress status of each worksite per work type; specifying, based on the progress status, a work type of a worksite for which the work status has been delayed relative to the plan; and making, with regard to a work machine and a worker for the work type with the delay, a request for dispatch to the worksite with the delay to another worksite.

Abstract: This vibration actuator has a movable body having a coil, a fixed body having magnets, and a shaft part that rotatably supports the movable body, wherein the movable body reciprocally and rotationally vibrates around the shaft part with respect to the fixed body through the interaction of the coil and the magnets. The magnets are arranged in a direction perpendicular to the axial direction of the shaft part and each have two magnetic poles that face the movable body in the coil axial direction of the coil, the shaft part supports the movable body at a position shifted from the center position of the movable body in a direction perpendicular to the axial direction of the shaft part, and the coil axis of the coil of the movable body is located at a position facing a switching position of the magnetic pole of the magnet.

Abstract: An endoscope objective optical system includes in order from an object side, a front group having a positive refractive power, an aperture stop, and a rear group having a positive refractive power. The front group includes a negative lens which nearest to object, a rear group includes a positive lens which is nearest to image, and the endoscope objective optical system satisfies following conditional expressions (1??), (2) and (3??). ?15.0<ff/f1<?4.2??(1??) ?1.70<f1/f<?0.95??(2) 0.6<g1/g2<1.20??(3??) where, ff denotes a focal length of the positive lens, f1 denotes a focal length of the negative lens, f denotes a focal length of the overall endoscope objective optical system, g1 denotes a focal length of the front group, and g2 denotes a focal length of the rear group.

Abstract: A heater includes an irradiator configured to irradiate a heating object including a liquid attachment region, onto which a liquid is applied, with an active energy ray, and circuitry configured to control an output of the active energy ray emitted from the irradiator to an edge portion in the liquid attachment region of the heating object to be larger than an output of the active energy ray emitted from the irradiator to a non-edge portion in the liquid attachment region excluding the edge portion.

Abstract: An image forming apparatus includes a conveyer configured to convey a recording medium on which a mark is formed; an image reader configured to read an image formed on the recording medium while the recording medium is being conveyed; a detector configured to detected a value corresponding to a conveyance amount of the recording medium conveyed by the conveyer and output the detected value; and a processor and a memory that stores program instructions causing the processor to calculate a position of the mark on the recording medium with respect to a conveyance direction of the recording medium based on respective detected values output from the detector when an edge of the recording medium and the mark are read by the image reader.

Abstract: A liquid discharge apparatus includes a first liquid that generates heat in an absorption wavelength region of an active energy ray, a first discharger configured to discharge the first liquid, a second liquid that starts polymerization in the absorption wavelength region of the active energy ray, a second discharger configured to discharge the second liquid, and an irradiator configured to irradiate the first liquid and the second liquid with the active energy ray.

Abstract: A mower comprises: a cutter housing having an inner hole in which an output shaft of a motor is inserted; and a motor cover provided above the cutter housing with a space therebetween, the motor cover covering the motor. Cooling air leadout openings for leading cooling air in the motor cover to the outside are formed in the motor cover, the cooling air leadout openings being positioned inward of a peripheral wall part of the motor cover and outward of the inner hole of the cutter housing.

Abstract: A conveying device includes a conveyor, a detector, and circuitry. The conveyor conveys a recording medium in a conveyance direction. The detector detects a skew amount and a shift amount of a posture of the recording medium to be sent to the conveyor and detects, in parallel, end positions of the recording medium in a width direction of the recording medium intersecting with the conveyance direction, at at least three different points in the conveyance direction on one end of the recording medium in the width direction. The circuitry controls an operation of the conveyor and causes the detector to detect a corner folded portion of the recording medium based on the end positions of the recording medium in the width direction detected at the at least three different points.

Abstract: A sheet heater includes a first conveyance belt configured to convey a sheet on which a liquid has been discharged in a conveyance direction, a heating unit facing the first conveyance belt, the heating unit configured to heat the sheet conveyed by the first conveyance belt, and a second conveyance belt disposed upstream of the first conveyance belt in the conveyance direction, the second conveyance belt configured to convey the sheet to the first conveyance belt. A surface temperature of the second conveyance belt is lower than a surface temperature of the first conveyance belt when the first conveyance belt and the second conveyance belt convey the sheet.