Abstract: Provided are: a culture fluid for hydroponics accompanied by a large amount of water absorption by plants; an additive for a culture fluid, the additive enabling such a culture fluid to be readily prepared; and a cultivation method in which the same is used. A culture fluid for hydroponics contains water-soluble polymeric molecules, and has a surface tension at 20° C. of 45 mN/m or more and 70 mN/m or less, and a kinematic viscosity at 30° C. of 0.8 mm2/s or more and 2.00 mm2/s or less.

Abstract: A plug of a connector includes a terminal portion to be inserted into and removed from an insertion portion of a receptacle. The terminal portion includes a contact, and a holder portion that holds the contact. The holder portion includes a flange portion having a distal end portion protruding toward an insertion direction of the insertion and removal direction from a distal end of the contact in the insertion direction and protruding in a predetermined orthogonal direction orthogonal to the insertion and removal direction. The flange portion is configured to position the terminal portion inserted into the insertion portion in the orthogonal direction.

Abstract: Provided are a polyvinyl alcohol-based resin having an excellent plugging effect and a plugging agent for underground treatment. A polyvinyl alcohol-based resin is disclosed, in which a degree of swelling (%) when the polyvinyl alcohol-based resin is immersed in water at 40° C. for 30 minutes and a solubility (%) when the polyvinyl alcohol-based resin is immersed in water at 65° C. for 5 hours satisfy the degree of swelling/the solubility?3.0.

Abstract: The present invention provides a vinyl alcohol polymer having properties comparable to the properties of vinyl alcohol polymers of solely petroleum origin, and, in using the vinyl alcohol polymer (PVA), saves petroleum resources, and reduces carbon dioxide emissions in production processes. The present invention relates to a vinyl alcohol polymer (X) obtained through saponification after polymerization of a plant-derived vinyl ester monomer (A) and a petroleum-derived vinyl ester monomer (B), and having a mole ratio (A)/(B) of 5/95 to 100/0.

Abstract: A receptacle includes: a first-direction opening configured to be inserted and pulled out by a male terminal of a plug along a first direction; a second-direction opening configured to be inserted and pulled out by the male terminal along a second direction; and a female terminal configured to come into contact with the male terminal. The female terminal includes a plurality of arm portion pairs, each of which has arm portions extending the first direction and arranged to face each other, arranged in the second direction. Each of the arm portion pairs has contact positions at which each of the arm portion pairs is configured to come into contact with the male terminal inserted from the second-direction opening. The contact positions of one of the arm portion pairs are different from the contact positions of the other arm portion pairs in the first direction.

Abstract: In a hydraulic brake system, when a main power supply is in an abnormal condition in which it cannot supply electric power to a pump motor, etc., the pump motor is operated with electric power supplied from an auxiliary power supply, irrespective of the presence of a braking request. Thus, when the main power supply is in the abnormal condition, the number of times inrush current flows is reduced. As a result, the voltage of the auxiliary power supply is less likely to be lower than an operation minimum voltage, and the hydraulic brake system is less likely to be unable to be operated.

Abstract: The present invention relates to a ballast water treatment pack comprising: a chlorine-based sterilizing agent; and a wrapper formed of a water-soluble film or a water-soluble fiber entangled body for wrapping the chlorine-based sterilizing agent.

Abstract: A particulate plugging agent, such as a diverting agent and/or loss circulation material, using a particular polyvinyl alcohol with a certain amount of monovalent metallic salt, which is water-soluble and has a buffer effect even if the environment is acidic, and thus stable, which in particular finds use in various subsurface oil production operations.

Abstract: A ballast water treatment method includes: a step of supplying a sterilizing component to a ballast pipe while taking ballast water into a ballast tank through the ballast pipe; a first measurement step of measuring the concentration of the sterilizing component in the ballast water after the sterilizing component is supplied; a circulation step of returning the ballast water stored in the ballast tank to the ballast pipe through a circulation pipe; a second measurement step of measuring the concentration of the sterilizing component contained in the ballast water returned to the ballast pipe; and a step of supplying the sterilizing component to the ballast pipe 2 when the concentration of the sterilizing component measured in the second measurement step is less than 0.2 times the concentration of the sterilizing component measured in the first measurement step.

Abstract: An electric-brake controller controls an electric brake operable by an electric motor. The electric-brake controller includes: a rotation-angle obtainer including (i) a relative-rotation-angle obtaining unit that obtains a relative rotation angle of the electric motor for a set time, based on values output and received from a rotation-angle sensor at intervals of the set time, and (ii) an absolute-rotation-angle obtaining unit that calculates the obtained relative rotation angle with consideration of an orientation of the relative rotation angle to obtain an absolute rotation angle that is a rotation angle of the electric motor from a start of its operation; a recognition-error detector that detects a recognition error in the rotation-angle obtainer based on the obtained absolute rotation angle or a changing state of the absolute rotation angle; and a motor controller that controls the electric motor based on a result of detection performed by the recognition-error detector.

Abstract: Provided are a polyvinyl alcohol-based resin having an excellent plugging effect and a plugging agent for underground treatment. A polyvinyl alcohol-based resin is disclosed, in which a degree of swelling (%) when the polyvinyl alcohol-based resin is immersed in water at 40° C. for 30 minutes and a solubility (%) when the polyvinyl alcohol-based resin is immersed in water at 65° C. for 5 hours satisfy the degree of swelling/the solubility?3.0.

Abstract: A particulate plugging agent, such as a diverting agent and/or loss circulation material, using a particular polyvinyl alcohol with a certain amount of monovalent metallic salt, which is water-soluble and has a buffer effect even if the environment is acidic, and thus stable, which in particular finds use in various subsurface oil production operations.

Abstract: In a hydraulic brake system, when a main power supply is in an abnormal condition in which it cannot supply electric power to a pump motor, etc., the pump motor is operated with electric power supplied from an auxiliary power supply, irrespective of the presence of a braking request. Thus, when the main power supply is in the abnormal condition, the number of times inrush current flows is reduced. As a result, the voltage of the auxiliary power supply is less likely to be lower than an operation minimum voltage, and the hydraulic brake system is less likely to be unable to be operated.

Abstract: A ballast water treatment method includes: a step of supplying a sterilizing component to a ballast pipe while taking ballast water into a ballast tank through the ballast pipe; a first measurement step of measuring the concentration of the sterilizing component in the ballast water after the sterilizing component is supplied; a circulation step of returning the ballast water stored in the ballast tank to the ballast pipe through a circulation pipe; a second measurement step of measuring the concentration of the sterilizing component contained in the ballast water returned to the ballast pipe; and a step of supplying the sterilizing component to the ballast pipe 2 when the concentration of the sterilizing component measured in the second measurement step is less than 0.2 times the concentration of the sterilizing component measured in the first measurement step.

Abstract: An electric power source system includes an electric power generator, a voltage conversion device, a battery, an electrical load, and a control device. The voltage conversion device converts a direct current voltage. The battery is electrically connected to the electric power generator through the voltage conversion device. The electrical load is electrically connected to the electric power generator in a parallel relationship with the battery without passing through the voltage conversion device. The control device is configured to charge the battery through the voltage conversion device based on regenerative electric power in a regenerative state in which the regenerative electric power is generated by the electric power generator. the control device is configured to increase an electric power consumption of the electrical load further when the control device detects an event that impedes the charging in the regenerative state than when the control device does not detect the event.

Abstract: A ballast water production method is provided. The method includes a filtering step that passes raw water supplied into a housing through a filter from a primary side that is upstream of the filter to a secondary side that is downstream of the filter; a volume-increasing step after the filtering step that increases a volume of water present in a space on the secondary side of the housing while the supply of the raw water into the housing is stopped; a pressurizing step after the volume-increasing step that pressurizes an inside of the housing from the secondary side while the supply of the raw water into the housing is stopped; and a rinsing step after the pressurizing step that passes a fluid through the filter from the secondary side to the primary side while the supply of the raw water into the housing is stopped.

Abstract: An electric-brake controller controls an electric brake operable by an electric motor. The electric-brake controller includes: a rotation-angle obtainer including (i) a relative-rotation-angle obtaining unit that obtains a relative rotation angle of the electric motor for a set time, based on values output and received from a rotation-angle sensor at intervals of the set time, and (ii) an absolute-rotation-angle obtaining unit that calculates the obtained relative rotation angle with consideration of an orientation of the relative rotation angle to obtain an absolute rotation angle that is a rotation angle of the electric motor from a start of its operation; a recognition-error detector that detects a recognition error in the rotation-angle obtainer based on the obtained absolute rotation angle or a changing state of the absolute rotation angle; and a motor controller that controls the electric motor based on a result of detection performed by the recognition-error detector.

Abstract: When it is judged that a downward slope segment exists in a scheduled traveling route, the control device of a hybrid vehicle sets a target remaining capacity SOC* in a pre-use segment in a downward slope segment and the downward slope segment to a “low-side remaining capacity Sd which is ?Sd smaller than a standard remaining capacity Sn.” Furthermore, when it is presumed that a rise amount of a remaining capacity by an extended regeneration control is large in the pre-use segment and the downward slope segment, the target remaining capacity SOC* is set to a “low-side remaining capacity Sd which is a sum of ?Sd and ?S1 smaller than the standard remaining capacity Sn.

Abstract: A ballast water treatment apparatus 1 comprises a ballast pipe 11 which guides ballast water to a ballast tank 60 and a sterilizing agent supply unit 30 which supplies a constant amount of a sterilizing agent per unit time to the ballast pipe 11 in accordance with a flow rate of ballast water flowing in the ballast pipe 11. A ballast water treatment method using the ballast water treatment apparatus 1 comprises steps of supplying ballast water to a ballast tank 60 via a ballast pipe 11 and supplying a constant amount of a sterilizing agent 33 per unit time to the ballast pipe 11 in accordance with a flow rate of the ballast water flowing in the ballast pipe 11.

Abstract: When a vehicle is in an accelerator off state and satisfies a free-run condition, a regeneration control unit performs free-run control on the vehicle so that the amount of regenerative electric power is decreased. The regeneration control unit sets a free-run prohibited zone between a starting point of a regeneration enhancement zone and a position that is located in front of and separated by a determination distance from the starting point.