Abstract: A row detection system includes a camera mounted to an agricultural machine to image a ground surface that is traveled by the agricultural machine to acquire time-series images including at least a portion of the ground surface, and a processor configured or programmed to perform image processing for the time-series images and to select, from the time-series images, a search region in which to detect at least one of crop rows and ridges, the search region having a size and shape including at least a portion of one or more wheels of the agricultural machine.

Abstract: An object of the present invention is to provide a method for producing 2,4-dialkylbenzaldehyde with excellent conversion rate and yield, and excellent regioselectivity for formylation, by allowing carbon monoxide to react on a starting material containing a specific m-dialkylbenzene in the presence of hydrogen fluoride and boron trifluoride. The method for producing 2,4-dialkylbenzaldehyde according to the present invention comprises a step of allowing carbon monoxide to react on a starting material containing m-dialkylbenzene represented by formula (1) in the presence of hydrogen fluoride and boron trifluoride for formylation at least at a position (a), wherein the starting material is a dialkylbenzene containing more than 90 mol % of m-dialkylbenzene represented by formula (1), and the number of moles of boron trifluoride relative to 1 mole of m-dialkylbenzene represented by formula (1) is 0.7 mol or more and 3.

Abstract: Provided is a vapor jetting device including: a box-shaped casing; a propellant holding unit that is placed in the casing and forms a space for holding a propellant; a gas storing unit that is placed in the casing, forms a space that is divided from the propellant holding unit by a partition wall including a communication hole, and stores gas; a machine housing unit that is placed in the casing, forms a space that is divided from the propellant holding unit and the gas storing unit by partition walls, and houses machines; a nozzle that is connected to the casing and ejects the gas to an outside; a gas flow path that is formed in the casing and supplies the gas stored in the gas storing unit to the nozzle; and a heater that is placed in the casing and heats at least the gas storing unit.

Abstract: A thruster designed to produce thrust by introducing a propellant to a catalyst layer from a propellant valve via a propellant introduction member and spurting out a gas resulting from decomposition of the propellant occurring on the catalyst layer, wherein the thruster comprises a chamber of an Ni alloy for holding the catalyst layer inside, the propellant introduction member is made of an Ni alloy and connects the propellant valve and the chamber, and a propellant valve flange of a Ti alloy with a plurality of columns of a Ti alloy is arranged between the chamber and the propellant valve to support the chamber by the columns.

Abstract: Provided is a vapor jetting device including: a box-shaped casing; a propellant holding unit that is placed in the casing and forms a space for holding a propellant; a gas storing unit that is placed in the casing, forms a space that is divided from the propellant holding unit by a partition wall including a communication hole, and stores gas; a machine housing unit that is placed in the casing, forms a space that is divided from the propellant holding unit and the gas storing unit by partition walls, and houses machines; a nozzle that is connected to the casing and ejects the gas to an outside; a gas flow path that is formed in the casing and supplies the gas stored in the gas storing unit to the nozzle; and a heater that is placed in the casing and heats at least the gas storing unit.

Abstract: A thruster designed to produce thrust by introducing a propellant to a catalyst layer from a propellant valve via a propellant introduction member and spurting out a gas resulting from decomposition of the propellant occurring on the catalyst layer, wherein the thruster comprises a chamber of an Ni alloy for holding the catalyst layer inside, the propellant introduction member is made of an Ni alloy and connects the propellant valve and the chamber, and a propellant valve flange of a Ti alloy with a plurality of columns of a Ti alloy is arranged between the chamber and the propellant valve to support the chamber by the columns.

Abstract: A wind turbine generator includes: a tower; a rotor supported by the tower to rotate around a rotational axis which is not parallel with an axis direction of the tower by wind power; a generator driven by a rotational force of the rotor; a sensor that detects vibration component in a direction perpendicular to the rotational axis of the rotor; and a control device that controls the rotor so that fluctuation of the rotor is caused to suppress the vibration component.

Abstract: A wind turbine generator includes: a tower; a rotor supported by the tower to rotate around a rotational axis which is not parallel with an axis direction of the tower by wind power; a generator driven by a rotational force of the rotor; a sensor to detect vibration component in a direction perpendicular to the rotational axis of the rotor; and a control device to control the rotor so that fluctuation of the rotor is caused to suppress the vibration component.

Abstract: A horizontal axis wind turbine is disclosed. When a wind direction changes to blow against a rotor from a rear side, a pitch angle of a rotor blade of the rotor are controlled to reverse a rotation of the rotor, without turning of the rotor to the rear side.

Abstract: A method for controlling a gaming machine of the invention includes a first step of successively displaying a plurality of symbols whose sequential relationship has been determined beforehand on symbol display sections, across one of which a winning line is provided; a second step of sequentially stopping the variable display operations at certain timings, manually or automatically; and a third step of alternately selecting a symbol from the group comprising the symbols stationarily displayed in the second step and a group of symbols satisfying a predetermined condition, the selected symbol to be stationarily displayed next on any of symbol display sections located on a specific winning line by means of sequential stoppage, so as to follow any of the symbols stationarily displayed in the second step. Processing pertaining to the first through third steps is repeated until the specific symbols are stationarily displayed on all the symbol display sections.

Abstract: A tower comprises a base tower member fixed on a base in the ground, a lower tower member hingedly connected at a lower end thereof with an upper end of the base tower member through a hinge and swinging between a lying position and a standing position, a first stage connecting tower member connected at a lower end thereof with an upper end of the lower tower member, a second stage connecting tower member connected at a lower end thereof with an upper end of the first stage connecting tower member, and a third stage connecting tower member connected at a lower end thereof with an upper end of the second stage connecting tower member. Thus formed tower is raised swingingly around the hinge from the lying position to the standing position. A nacelle includes a tower penetrating hole through which the tower vertically penetrates and is formed by a plurality of nacelle sections divisible around the tower penetrating hole.

Abstract: A jacket having a pair of small helical gears is spline-fitted around a splined shaft. Since the small helical gears have an adverse helix angle to each other, the jacket moves along the spline shaft in the axial direction so as to distribute an equal torque to both small helical gears. The splited torque is transmitted to a pair of drive shafts each of which drives the main rotor of a helicopter through a combination of gear and pinion. The drive shafts are fixed axially and therefore helical gears or double-helical gears can be used in the combination of gear and pinion.

Abstract: The present invention relates to a pipe repair method using a shape-memory alloy that can correspond to pipes of any shape and dimension. The pipe repair method comprises the steps of applying a seal member to a damaged portion of the pipe so as to cover the damaged portion and winding a plate made from a shape-memory alloy that contracts to a memorized shape around a periphery of the pipe so as to cover the seal portion when heated.

Abstract: A hydraulic control system for aircraft is disclosed, which has a flight maneuver system mounted on the aircraft and provided with a maneuver signal input and output system for controlling the aircraft depending on flight conditions. The system includes a differentiating circuit responsive to a first output signal for calculating an actuating speed of a servo actuator and for generating a speed signal Vc, a load calculating circuit responsive to the load signal for computing the load on the actuator and for producing a load signal, a pressure calculating circuit responsive to the speed and load signals for computing a pressure Ps to the actuator and for producing a pressure signal, and a setting circuit responsive to the pressure signal for deciding an optimum pressure of the hydraulic pump so as to precisely control the flight surface without energy loss. The pressure Ps is calculated by the following formula:Ps=E.multidot.(Vc/Vm).sup.2 .multidot.

Abstract: A shell for a chair in which a bottom shell structure and a backrest shell structure are connected to supporting frame members. The bottom shell structure has a bottom portion and a partial backrest portion that are connected by a curved portion with plural slots. Sideways notches are connected to the extreme left and right slots and extend toward the left and right edges of the shell structure. The edges of the shell adjacent the notches are curved into a U shape. This construction increases the flexibility of the curved portion, while maintaining a significant portion of the unslotted material strength. A separate shell structure is attached to supporting bars and forms the remainder of the backrest support. This separate shell structure has a jagged cross sectional shape where substantially parallel projections and recesses form grooves which extend the length of the backrest shell.

Abstract: A shell for a chair in which a bottom shell structure and a backrest shell structure are connected to supporting frame members such that when a light load is applied to the separate backrest shell the backrest shell will bend to accommodate the load, whereas when a heavy load is applied to the backrest shell the backrest bends and the supporting bars rock backwards. The bottom shell structure has a bottom portion and a partial backrest portion which are integrally formed on the same material and are connected by a curved portion with plural slots. Sideways notches are connected to the extreme left and right slots and extend toward the left and right edges of the shell structure. The edges of the shell adjacent the notches are curved into a U shape. This construction increases the flexibility of the curved portion, while maintaining a significant portion of the unslotted material strength. A separate shell structure is attached to supporting bars and forms the remainder of the backrest support.

Abstract: There is provided an interlocking supporting mechanism for supporting the seat and seat back of a chair, particularly an office chair. In the supporting mechanism a link system is utilized to interlock the seat with the seat back, so that the chair is capable of smoothly moving as a seated person moves.The front portion of a lever member is pivotally connected to the front portion of a frame member which is supported by a fixing member and which extends toward the front portion of the seat. The lever member is attached, with the aid of horizontal shafts on the right-hand and left-hand sides of the seat, to the lower portions of back supporting bars. A spring member is provided between the frame member and the lever member so that the lever member is rocked on the horizontal shafts. A member for receiving the seat includes a front seat-receiving member and a back seat-receiving member.