Abstract: A portable drone port that is portable and disposed on a landing surface for a drone includes a covering section configured to cover the landing surface and provided with markers of different sizes. The covering section includes a restraining section configured to restrain, on the covering section, the drone that lands on the covering section. The restraining section is hook-and-loop fasteners including a hook-and-loop fastener on one side disposed on the covering section and a hook-and-loop fastener on the other side disposed on the drone and configured to join to the hook-and-loop fastener on the one side.

Abstract: An automatic landing system for a vertical take-off and landing aircraft includes: a camera mounted on a vertical take-off and landing aircraft; a relative-position acquisition unit configured to perform image processing on an image captured by the camera, the image including a marker group provided at a target landing point, to acquire a relative position between the vertical take-off and landing aircraft and the target landing point; and a control unit configured to control the vertical take-off and landing aircraft such that the relative position becomes zero, in which the marker group includes a plurality of markers that are arranged side by side and that have different center positions from each other, the markers are larger as arranged farther away from the target landing point, and the relative-position acquisition unit acquires the relative position based on a distance between the marker recognized in the image and the target landing point.

Abstract: An aircraft position control system to make a position of an aircraft follow movement of a target landing point due to motion includes a motion quantity estimation processing unit that estimates a motion quantity of the target landing point, based on attitude correction acceleration for correcting attitude of the aircraft and a relative position between the aircraft and the target landing point, and a target information generation unit that outputs a target relative position between the aircraft and the target landing point to be achieved and target relative velocity between the aircraft and the target landing point to be achieved, based on the estimated motion quantity.

Abstract: The accessory attachment structure for attaching an accessory to a steel plate-reinforced concrete structure, the steel plate-reinforced concrete structure being provided with a steel plate frame, bars fixedly installed on an inner face of an outside steel plate, and concrete, the accessory attachment structure includes an attachment plate in which one face thereof is attached to the outside steel plate and the accessory is attached to the other face thereof. The size of the other face of the attachment plate is larger than that of a whole attachment face to be attached to the attachment plate of the accessory, the size if the one face is equal to or greater than the other face, and the length of the attachment plate in any direction along the one face of the attachment plate is at least two times greater than a mutual interval between the bars.

Abstract: An amphibious vehicle includes: an engine; at least one land traveling device; at least one water propelling device; a power distribution device configured to distribute power outputted from the engine between land travel power to be supplied to the at least one land traveling device and water propulsion power to be supplied to the at least one water propelling device; a slippage-amount detection device configured to detect a slippage amount of the at least one land traveling device relative to ground; and a controller configured to adjust at least the land travel power, of the land travel power and the water propulsion power, on the basis of the slippage amount detected by the slippage-amount detection device.

Abstract: To parry a blast caused by an explosive object, absorb explosive energy, and improve durability. An armor to be installed on a bottom surface of a vehicle, including: a bottom plate formed to have a shape in which a central portion protrudes downward, and a porous metal member-disposed on the upper side of the bottom plate.

Abstract: To parry a blast caused by an explosive object, absorb explosive energy, and improve durability. An armor to be installed on a bottom surface of a vehicle, including: a bottom plate formed to have a shape in which a central portion protrudes downward, and a porous metal member-disposed on the upper side of the bottom plate.

Abstract: An amphibious vehicle includes: an engine; at least one land traveling device; at least one water propelling device; a power distribution device configured to distribute power outputted from the engine between land travel power to be supplied to the at least one land traveling device and water propulsion power to be supplied to the at least one water propelling device; a slippage-amount detection device configured to detect a slippage amount of the at least one land traveling device relative to ground; and a controller configured to adjust at least the land travel power, of the land travel power and the water propulsion power, on the basis of the slippage amount detected by the slippage-amount detection device.

Abstract: A repair method according to the present invention is a method for repairing a honeycomb core sandwich panel, the method including: a repair patch disposing step of disposing a repair patch and an adhesive on at least one of a first surface and a second surface of the panel, the first outer skin being located on the first surface, and the second outer skin being located on the second surface; a panel restraining step of sandwiching the panel and the repair patch from both surface sides of the first surface and the second surface and thereby restraining the panel; and a heating step (thermal curing step) of heating the adhesive while the panel is restrained.

Abstract: A repair method according to the present invention is a method for repairing a honeycomb core sandwich panel 1, the method including: a repair patch disposing step S1 of disposing a repair patch 20 and an adhesive 21A on at least one of a first surface 1A and a second surface 1B of the panel 1, the first outer skin 11 being located on the first surface 1A, and the second outer skin 12 being located on the second surface 1B; a panel restraining step S3 of sandwiching the panel 1 and the repair patch 20 from both surface sides of the first surface 1A and the second surface 1B and thereby restraining the panel 1; and a heating step (thermal curing step) S4 of heating the adhesive 21A while the panel 1 is restrained.

Abstract: A resistive element in the form of a bent metal plate is placed in a box-shaped case and has electrodes exposed out of the box-shaped case. A heat radiator in the form of a bent metal plate is also placed in the box-shaped case and has heat radiating electrodes exposed out of the box-shaped case. The resistive element and the heat radiator are held out of contact with each other and disposed in criss-cross relation to each other. The box-shaped case is filled with a cement material in surrounding relation to the resistive element and the heat radiator.

Abstract: A resistive element in the form of a bent metal plate is placed in a box-shaped case and has electrodes exposed out of the box-shaped case. A heat radiator in the form of a bent metal plate is also placed in the box-shaped case and has heat radiating electrodes exposed out of the box-shaped case. The resistive element and the heat radiator are held out of contact with each other and disposed in criss-cross relation to each other. The box-shaped case is filled with a cement material in surrounding relation to the resistive element and the heat radiator.

Abstract: An aluminum alloy product includes additive elements of 3.0 to 4.2 wt % of silicon, 0.4 to 0.6 wt % of magnesium, 0.2 wt % or less of iron, and 0.5 wt % or less in total of zinc, manganese, nickel, tin and chromium. The additive element substantially excludes copper. The aluminum alloy product is formed by forging a casting of which shape is approximated to a shape of a final product.

Abstract: A thread regulating apparatus for a sewing machine having a plurality of thread regulators. Each regulator nips a thread between a pair of tension discs to apply tension to the thread. The tension applied to the thread is determined according to combination patterns of tension values stored in a memory.