Abstract: The present disclosure includes a system for pre-cooling produce or other goods while transporting goods that includes a plurality of refrigerated containers that are electrically connected with one other to share power between the containers. In some aspects, each refrigerated container includes a plurality of photovoltaic panels, a battery configured to receive electrical power from the plurality of photovoltaic panels, and a refrigerator configured to cool a cavity of the container. In some aspects, the system includes an energy distribution system configured to determine a power level of the batteries for each container and, based on the power level, transfer power to or from the batteries.

Abstract: A vent assembly, including a backplate having plurality of concentric cylinders arranged in an order of decreasing diameter, such that the concentric cylinders are separated by score lines and at least one of the cylinders is recessed from the backplate, and a vent flapper. The assembly may include a tube configured to attach to one of the cylinders and one or more tube stoppers to prevent the tube from being over inserted. The assembly may include a face plate, a tooth formed on the backplate, and a tooth receiver is formed on the face plate. The score lines may be dual-sided score lines. The assembly may include the vent flapper having one or more air intake openings formed within the vent flapper, such that the air intake openings allow air to flow both in and out.

Abstract: A prime mover and hydraulic actuators, a hydraulic machine having a rotatable shaft engaged with the prime mover and having a plurality of working chambers, a hydraulic circuit extending between a group of working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine having a low-pressure and a high-pressure valve regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine controlling the low-pressure valves of the group of working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the group of working chambers, responsive to a demand signal, the apparatus further having a controller calculating the demand signal responsive to a measured property of the hydraulic circuit or an actuator.

Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.

Abstract: A prime mover and a plurality of hydraulic actuators, a hydraulic machine having a rotatable shaft in driven engagement with the prime mover and comprising a plurality of working chambers, a hydraulic circuit extending between a group of one or more working chambers of the hydraulic machine and one or more of the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure valve which regulates the flow of hydraulic fluid between the working chamber and a low-pressure manifold and a high-pressure valve which regulates the flow of hydraulic fluid between the working chamber and a high-pressure manifold.

Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.

Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.

Abstract: A prime mover and a plurality of hydraulic actuators, a hydraulic machine having a rotatable shaft in driven engagement with the prime mover and comprising working chambers, a hydraulic circuit between working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure and high-pressure valves regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine being configured to actively control the low-pressure valves of the working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the working chambers, responsive to a demand signal, wherein the apparatus further comprises a controller configured to calculate the demand signal in response to a measured property of the hydraulic circuit or actuators.

Abstract: A fluid power system comprises a pump with multiple independently variable outlets, each of which is capable of delivering fluid in individually controllable volume units and a plurality of hydraulic loads. A system of switching valves is configured to create fluid connections between the pump outlets and the loads. A control system commands both the pump and the switching valves, so as to create valve state combinations to satisfy load conditions as demanded by an operator. The number of pump outlets connected to one or more of the loads is changeable to satisfy the flow required of the load due to the operator demand, each pump outlet being commanded to produce a flow depending on the status of other outlets connected a load to which the outlet is connected and the operator demand for that load.

Abstract: A multi-rotor aerial vehicle comprises at least two rotors, a controller, a power supply having an output shaft, a shaft-driven hydraulic machine coupled to the output shaft and at least two rotor-driving hydraulic machines coupled to respective rotors. At least one of the hydraulic machines is an electronically commutated hydraulic machine in which displacement of hydraulic fluid through each working chamber is regulated by electronically controllable valves, during each cycle of working chamber volume, in phased relationship to cycles of working chamber volume. The controller controls the electronically controllable valves of the electronically commutated hydraulic machines to independently control the rotation of the rotors. The shaft-driven hydraulic machine may be an electronically commutated machine with a plurality of independent outputs, which independently drive the rotor-driving hydraulic machines.

Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.

Abstract: A method of operating a hydraulic apparatus comprising a hydraulic circuit region and hydraulic machine which is controlled to displace pulses of fluid of known volume into or out of the hydraulic circuit region, generating pulses of pressure in the hydraulic circuit region and torque in the hydraulic machine shaft. The response of parts of the hydraulic apparatus to these pulses is measured and used to determine properties of the hydraulic apparatus. The response of the pressure in the hydraulic circuit region to pulses at different pressures can be used to measure the hydraulic stiffness of parts of the hydraulic circuit region. It is possible to detect faults and to make measurements useful in subsequent operation of the hydraulic apparatus.

Abstract: A prime mover and a plurality of hydraulic actuators, a hydraulic machine having a rotatable shaft in driven engagement with the prime mover and comprising a plurality of working chambers, a hydraulic circuit extending between working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure valve which regulates the flow of hydraulic fluid between the working chamber and a low-pressure manifold and a high-pressure valve which regulates the flow of hydraulic fluid between the working chamber and a high-pressure manifold. The hydraulic machine being configured to actively control at least the low-pressure valves of the working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the working chambers, responsive to a demand signal.

Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.

Abstract: A method, computer system, and computer program product are provided for managing tasks of employees within a blockchain-based workflow system. A workflow transaction associated with a workflow stage is received from an employee. The workflow system records the workflow transaction in a workflow blockchain. Based on a smart contract recorded within the blockchain, the workflow system determining a role for the employee is authorized to perform the transaction. If authorized, the workflow system executes a set of resulting transactions indicated by the smart contract and updates at least one condition for completion of the workflow stage. When the workflow system determines that all conditions indicated in the smart contract have been completed, the workflow system finalizes the workflow stage and advances the workflow to a subsequent stage.

Abstract: Pallet adapters configured to attach to a selected pallet type in order to render it compatible with a cargo restraint system that is configured for a larger pallet type. The pallet adapters may include two side rails and two end rails, each rail having a slotted inner face to receive the flanges at the sides and ends of the selected pallet type. Each end of the side rails has a connector that can be coupled by a single fastener to a connector on each end of the end rails so that when connected, the side rails and end rails form a rectangular-shaped pallet adapter with inner slots that secure the flanged side edges of the selected pallet type.

Abstract: Pallet adapters configured to attach to a selected pallet type in order to render it compatible with a cargo restraint system that is configured for a larger pallet type. The pallet adapters may include two side rails and two end rails, each rail having a slotted inner face to receive the flanges at the sides and ends of the selected pallet type. Each end of the side rails has a connector that can be coupled by a single fastener to a connector on each end of the end rails so that when connected, the side rails and end rails form a rectangular-shaped pallet adapter with inner slots that secure the flanged side edges of the selected pallet type.

Abstract: A resonant tank includes a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate. The first capacitor, the first inductor, the second capacitor, and the second inductor are connected in a ring configuration, with each capacitor connected between a pair of the inductors and with each inductor connected between a pair of the capacitors. An amplifier circuit is coupled to the resonant tank and configured to amplify a signal in the resonant tank.

Abstract: A method, computer system, and computer program product are provided for controlling access to a licensed software application. A blockchain-based version control system receives an access request from a user that requests access to the licensed software application. The version control system determines whether a user has accepted license terms for a current version of the licensed software application by querying a version control blockchain. Responsive To determining that the user has not accepted the license terms for the current version of the licensed software application, the version control system presents the user with a clickwrap agreement requiring the user to accept license terms for the current version of the licensed software application. Responsive to receiving acceptance of the license terms from the user, the user's acceptance of the license terms for the current version of the licensed software application is recorded in the version control blockchain.

Abstract: A method, computer system, and computer program product are provided for managing tasks of employees within a blockchain-based workflow system. A workflow transaction associated with a workflow stage is received from an employee. The workflow system records the workflow transaction in a workflow blockchain. Based on a smart contract recorded within the blockchain, the workflow system determining a role for the employee is authorized to perform the transaction. If authorized, the workflow system executes a set of resulting transactions indicated by the smart contract and updates at least one condition for completion of the workflow stage. When the workflow system determines that all conditions indicated in the smart contract have been completed, the workflow system finalizes the workflow stage and advances the workflow to a subsequent stage.