Abstract: A honeycomb sandwich panel having an absolute value of thermal expansion coefficient smaller than an absolute value of thermal expansion coefficient obtained by using carbon fiber reinforced plastic (CFRP) is provided. The honeycomb sandwich panel includes: a first skin being a plate material made of a low expansion metal being a metal having an absolute value of thermal expansion coefficient smaller than an absolute value of thermal expansion coefficient of CFRP; a second skin being a plate material made of the low expansion metal and arranged to face the first skin; and a core made of CFRP or the low expansion metal, being bonded to the first skin and the second skin and including a plurality of tubular cells each having a hexagonal cross section, the tubular cells being formed adjacently to each other.

Abstract: An optical device can deal with a relative difference in thermal expansion coefficient between a reflecting mirror and a mirror supporting member, and can also support the reflecting mirror with a simpler structure than the conventional one. The optical device includes: a reflecting mirror including a reflecting surface to reflect light, and a supported portion disposed on a rear surface and having three supported surfaces arranged with rotational symmetry of 120 degrees around an optical axis, the rear surface being a surface of the reflecting mirror existing on the contrary side to the reflecting surface; a structural member provided on a rear side of reflecting mirror; and three supporting members, each of the three supporting members including a mirror supporting portion connected to and supporting each of the three supported surfaces, and having two ends connected to the structural member.

Abstract: A work machine in which an engine and a reserving unit configured to reserve lubricating oil to be supplied to the engine are connected by a lubricating oil channel, and the lubricating oil is circulated, wherein at least a part of the lubricating oil channel and at least a part of a working fluid channel for a working fluid to be supplied to a work unit of the work machine are arranged such that heat can be exchanged between the lubricating oil and the working fluid.

Abstract: There is provided a work machine. A reserving chamber reserves lubricating oil to be supplied to an engine. A channel forming member forms a channel of the lubricating oil from the reserving chamber to the engine A press-feed unit press-feeds the lubricating oil reserved in the reserving chamber to the engine via the channel forming member. A float floats on an oil surface of the lubricating oil reserved in the reserving chamber A detection unit provided in the reserving chamber and detects the float A determination unit determines a tilt state of the reserving chamber based on a detection result of the detection unit A control unit controls the press-feed unit based on a determination result of the determination unit.

Abstract: Provided is an information providing system capable of promoting use of services relating to a lawn. An information providing system 1 includes: a gardener terminal 200 that provides gardener information regarding a service relating to a lawn; a customer terminal 300 that is communicably connected to the gardener terminal 200 and provides request information relating to the lawn; and an information providing device 100 that is communicably connected to the gardener terminal 200 and the customer terminal 300.

Abstract: Provided is an information providing system capable of promoting use of services relating to a lawn. An information providing system 1 includes a gardener terminal 200 and a customer terminal 300 communicably connected to the gardener terminal 200. The gardener terminal 200 includes a lawn state information generating unit 211, and the customer terminal 300 includes a lawn selecting unit 311. In a case in which a contract for a transaction relating to a lawn is concluded between a customer 30 using the customer terminal 300 and a gardener 20 using the gardener terminal 200, the lawn state information generating unit 211 generates lawn state information indicating a state of the lawn provided by the gardener 20, and transmits the lawn state information to the customer terminal 300, and the lawn selecting unit 311 selects the lawn provided by the gardener 20 based on the lawn state information.

Abstract: Provided is an information providing system capable of promoting the use of services relating to a lawn. The information providing system includes a gardener terminal and a customer terminal communicably connected to the gardener terminal. The gardener terminal includes the first fee setting unit that, in a case in which a contract for a transaction relating to a lawn is established between the customer using the customer terminal and the gardener using the gardener terminal, sets a first fee for the transaction relating to the lawn, based on an amount of the lawn produced by the transaction relating to the lawn, and the lawn state information generating unit that generates lawn state information including a use state of the lawn and the first fee, and transmits the lawn state information to the customer terminal.

Abstract: A rotation connecting mechanism includes: a joint that connects a second member rotatably to a first member with three rotational degrees of freedom; a first link and a third link in each of which one end is attached rotatably to second member with at least two rotational degrees of freedom while the other end is attached rotatably to first member with at least two rotational degrees of freedom, each of first link and third link having a variable length and five rotational degrees of freedom; a second link in which one end is attached rotatably to first link with at least two rotational degrees of freedom while the other end is attached rotatably to first member with at least two rotational degrees of freedom, second link having a variable length and five rotational degrees of freedom; and motors that generate force changing lengths of the three links.

Abstract: Provided is an insertion guide that performs accurate rotation correction between a shaft and a hole and phase correction between the shaft and hole. The shaft includes: a first guide portion at a distal end of the shaft having a diameter smaller than a diameter of the hole; a second guide portion, provided on a base end side of a first narrow cylindrical portion, and having a diameter smaller than the diameter of the hole and larger than a diameter of the first narrow cylindrical portion; and a third guide portion, provided at the distal end of the shaft, and is a recessed portion to be engaged with a protruding portion formed in the hole. The shaft being inclined with respect to the hole, is brought into contact with the hole at two points or less before the third guide portion is brought into contact with the protruding portion.

Abstract: A mirror replacement device includes a gripping mechanism to grip a segment mirror, a fine drive mechanism to change a position and a posture of the gripping mechanism, a lift mechanism for the segment mirror, a first detector to detect a relative position and a relative posture between a comparison object and a target object, a second detector to detect a bend of the fine drive mechanism, and a mirror replacement controller to replace the segment mirror based on detection signals output from the above-mentioned detectors. The controller determines whether the first detector can successfully perform a measurement. When it is determined that the measurement can be successfully performed, the control is performed based on the detection signal output from the first detector. When it is determined that the measurement cannot be successfully performed, the control is performed based on the detection signal output from the second detector.

Abstract: A remote control manipulator system includes a manipulator controlled remotely by an operator; a camera to capture an image including the manipulator; a posture sensor to detect posture data; an action instruction inputter with which the operator inputs an action instruction instructing action to move or stop the manipulator; a control device including a structural data storage to store manipulator structural data representing a structure of the manipulator, a model image generator to generate a model image with referring to the structural data storage and the posture data, and a presentation image generator to generate a presentation image by superimposing a model image on the captured image; and a display to display the presentation image.