Abstract: A control method of a hybrid power switch having at least a first switching device connected in parallel with a second switching device is provided. A first gate signal is provided to the first switching device for turning on and turning off the first switching device. A second gate signal is provided to the second switching device for turning on and turning off the second switching device. A first delay time is stablished between the turning on of the first switching device and the turning on of the second switching device, and a second delay time is established between the turning off of the first switching device and the turning off of the second switching device. The temperature of the first switching device is determined, and at least one of the first and second delay times is modified depending on such temperature.

Abstract: A system and method of lifting and positioning patients uses a patient's center of gravity for leverage to enable a caregiver to readily move a patient with less effort. The system includes a device with a tension sheet and tension rollers located at opposite ends of the device. The tension rollers are configured to increase tension in the tension sheet, which creates leverage to assist positioning of the patient. The patient lifting and positioning system aims to reduce injury risk for both the caregiver and any patient being assisted to lay down and sit up. Further, the system and method uses leverage to assist a patient lay flat on an exam table or bed from the sitting position to the laying position, and back to the sitting position with less effort.

Abstract: A power conversion system is provided, which system includes a first power converter including power electronic switches of a first type that are switchable to provide electric power conversion; and a second power converter connected in parallel to the first power converter. The second power converter includes power electronic switches of a second type that are switchable to provide electric power conversion. The second type is different from the first type. The second type of power electronic switches includes wide bandgap semiconductor switches. The system further includes a controller configured to operate the power conversion system in a first operating mode in which the second power converter is operated at a first switching frequency, and in a second operating mode in which the second power converter is operated at a second switching frequency of the power electronic switches and the first power converter is operated to provide power conversion.

Abstract: Provided are methods for labeling ultrasound data. The method may include training a convolutional neural network (CNN) based on ultrasound data. The ultrasound data may include ultrasonic waveform data (e.g., radio frequency (RF) waveform data). An RF input of each downsampling layer of a plurality of downsampling layers in the CNN may be downsampled. The RF input may include RF waveform data for an ultrasound. Tissues in the ultrasound may be segmented based on an output of the CNN. A system is also disclosed.

Abstract: A wind power plant for providing electrical power to a utility grid is provided, the wind power plant including: at least one wind turbine having a wind turbine generator coupled to a wind turbine rotation shaft to which plural rotor blades are mounted, the wind turbine providing electric power at an output terminal; at least one power conversion system, each including: a plant motor electrically coupled and configured to receive the electric power from the output terminal of the at least one wind turbine and convert it into rotational power of a plant motor shaft; a plant generator mechanically coupled to the plant motor shaft and electrically coupleable to the electric utility grid.

Abstract: In an approach to obfuscation of sensitive information through non-visual feedback, responsive to receiving a signal from a user to start a session requiring input of sensitive data, one or more dummy character positions are determined, where the one or more dummy character positions represent characters that are not part of the sensitive data. Responsive to a current character position is any dummy character position of the one or more dummy character positions, the user is signaled that a next input character will be ignored, where the user is signaled using non-visual feedback. Responsive to receiving the next input character from the user, where the current character position is any dummy character position of the one or more dummy character positions, the next input character is ignored.

Abstract: A wind turbine electrical power generating system includes a first generator configured to be mechanically coupled to a rotor, a second generator configured to be mechanically coupled to the rotor; and an electrical power conversion system including at least a first and a second power converter section. The first power converter section is electrically coupled between a rotor winding of the first generator and a coupling point and a stator winding of the first generator is electrically coupled to the coupling point such that only a fraction of electrical power generated by the first generator passes through the power conversion system. The second power converter section is electrically coupled between an electrical power output of the second generator and the coupling point such that the electrical power provided by the second generator to the coupling point passes through the power conversion system.

Abstract: A method for controlling the reactive power exchange of a DFIG wind facility with the grid is provided. The method includes determining a grid side converter reactive power thermal limit value and determining the value of the required DFIG magnetizing reactive power to be consumed by the stator. Then setting dynamically the sharing of the reactive power between the stator and the GSC such that the GSC reactive power value is the difference between the reactive power demand of the DFIG wind facility and the magnetizing reactive power consumed by the stator. Afterwards operating the DFIG wind turbine facility such that the absolute value of GSC reactive power is adjusted to be below the grid side converter reactive power thermal limit value value. An arrangement and a wind turbine are also provided.

Abstract: A method for computer-implemented controlling a doubly-fed electric machine, where stator windings are directly connected to an electrical grid and where rotor windings of a rotor are connected to the electrical grid via a power conversion system, includes an AC-to-DC converter and a DC-to-AC converter and being adapted to control a rotor current, the method including obtaining a rotational speed of the machine; determining, whether the obtained rotational speed is within a predetermined operational speed range around the synchronous speed; and if it is determined that the obtained rotational speed is within the predetermined operational speed range, controlling the AC-to-DC converter of the power conversion system to force injection of a stator reactive power to create a harmonic at a frequency different than a rated frequency of the machine; and controlling the DC-to-AC converter of the power conversion system to compensate the created stator reactive power and the harmonic.

Abstract: A method of controlling the operation of a doubly fed induction machine is provided. The DFIM includes a stator electrically coupled to a power grid and a rotor rotating with a rotational speed. The DFIM has a synchronous rotational speed of the rotor and a rated rotational speed of the rotor. Rotation of the rotor at the synchronous rotational speed generates one or more slot harmonic distortions having a harmonic order. The method comprises operating the DFIM at the rated rotational speed of the rotor, wherein the rated rotational speed of the rotor is set to a value selected such that a shift of the harmonic order of one or more of the slot harmonic distortions at the rated rotational speed of the rotor is an integer number or is within a predefined limit of an integer number.

Abstract: The invention relates to a brake system (100) for braking a rotation shaft (1), characterised in that it comprises: at least one piston (4), actuated by means of an electric linear actuator (3), able to move between a retracted release position and a final extended braking position; a casing (6) adapted to rotate integrally with the rotation shaft, with a cavity closed by a perpendicular cover (5), provided with at least one opening in which the piston (4) is fitted, and the piston (4) having the ability to move forwards into the closed cavity and move backwards, and a filling occupying the closed cavity, rotating with the casing, consisting of a dispersion (7) or amalgam formed by a powdery or granular product with a lubricating agent.

Abstract: Provided are systems, methods, and computer program products for extracting features from imaging biomarkers with machine-learning models. The method includes training a first artificial intelligence (AI) model based on first training data including images labeled with imaging biomarkers, the first AI model trained to identify a plurality of imaging biomarker features in at least one image, training a second AI model based on second training data including sets of imaging biomarker features associated with task-specific labels, the second AI model trained to identify at least one task-specific feature based at least partially on a set of imaging biomarker features, processing at least one input image with the first AI model to generate a first AI model output, and processing the first AI model output with the second AI model to generate a second AI model output.

Abstract: A DFIG wind power facility configured to be operated during grid faults is provided. The wind power facility includes a Doubly-Fed Induction Generator, a control system, an electric converter, a short-circuit controlled switch to selectively short-circuit the stator and a Stator Neutral Brake Chopper coupled to the stator. The DFIG includes a rotor and a stator, the stator including at least one three-phase winding. The electric converter includes a Machine Side Converter, a Grid Side Converter and a DC link connected therebetween. The SNBC includes a three-phase rectifier including three inputs, an impedance and an active high-frequency switch configured to vary the average value of the impedance by adjusting its duty cycle; wherein each of the three inputs of the rectifier is connected to a phase of the at least one three-phase winding of the stator. Methods for operating a DFIG wind power facility during grid faults are also provided.

Abstract: A control method of a hybrid power switch having at least a first switching device connected in parallel with a second switching device is provided. A first gate signal is provided to the first switching device for turning on and turning off the first switching device. A second gate signal is provided to the second switching device for turning on and turning off the second switching device. A first delay time is stablished between the turning on of the first switching device and the turning on of the second switching device, and a second delay time is established between the turning off of the first switching device and the turning off of the second switching device. The temperature of the first switching device is determined, and at least one of the first and second delay times is modified depending on such temperature.

Abstract: Disclosed herein are systems and devices for use in determining a level of a trait in an agriculture or food product sample. Further disclosed is a portable spectrometer system coupled with chemometric analysis methods to determine a level of a trait in an agriculture or food product sample, the portable spectrometer system comprising: a spectrometer; a sample stage adjacent the spectrometer; a motor coupled to the sample stage; and a system housing enclosing the motor and the spectrometer; wherein rotation of the motor rotates the sample stage, and wherein the motor is controllable in response to spectroscopy requirements.

Abstract: A slip ring unit for an electric generator is provided. The slip ring unit includes a slip ring attachable to a rotor shaft of the electric generator, a plurality of sliding contacts arranged along a circumference of the slip ring, to provide an electrical connection with the slip ring, at least one temperature sensor for measuring a temperature inside the slip ring unit, a fan for providing a cooling flow in the slip ring unit, and a controller connected to the fan for controlling the cooling flow rate generated by the fan, the controller being connected to the at least one temperature sensor. The at least one temperature sensor is attached to at least a holder for supporting the sliding contacts. The controller is configured in such a way that the cooling flow rate is generated depending on the temperature measured by the at least one temperature sensor.

Abstract: A method for controlling the reactive power exchange of a DFIG wind facility with the grid is provided. The method includes determining a grid side converter reactive power thermal limit value and determining the value of the required DFIG magnetizing reactive power to be consumed by the stator. Then setting dynamically the sharing of the reactive power between the stator and the GSC such that the GSC reactive power value is the difference between the reactive power demand of the DFIG wind facility and the magnetizing reactive power consumed by the stator. Afterwards operating the DFIG wind turbine facility such that the absolute value of GSC reactive power is adjusted to be below the grid side converter reactive power thermal limit value value. An arrangement and a wind turbine are also provided.

Abstract: A pharmaceutical composition for use in preventing or treating graft versus host disease (GVHD) in a subject wherein the composition includes intact microvesicles isolated from a biological fluid using polyethylene glycol (PEG) precipitation, wherein administration of the pharmaceutical composition alleviates or prevents one or more symptoms of GVHD in the subject. Also described is a method of preventing or treating graft versus host disease (GVHD) in a subject comprising administering to the subject a pharmaceutical composition comprising intact microvesicles isolated from a biological fluid of an unrelated or related donor using polyethylene glycol (PEG) precipitation wherein one or more symptoms of GVHD comprising weight loss, cutaneous tissue damage, subcutaneous tissue damage, cutaneous inflammation, satellite cell necrosis, truncated lifespan, and/or subcutaneous inflammation are prevented or alleviated in the subject.

Abstract: Some embodiments provide a method of treating skeletal muscular myopathy, e.g., Duchenne muscular dystrophy (DMD), with cardiosphere-derived cells (CDCs), wherein a therapeutically effective amount of CDCs is delivered to a targeted dystrophic skeletal muscle. Some embodiment enable delivery of a therapeutically effective amount of CDCs via intramuscular injection directly at a skeletal muscle or systemic administration, e.g., intravenous injection, in a single dose or multiple doses, to treat a targeted dystrophic skeletal muscle. Some embodiments provide a method for improving exercise capabilities in DMD patients. Additional embodiments relate to exosome mediated transfer of noncoding RNAs ameliorates Duchenne muscular dystrophy by restoring dystrophin in heart and skeletal muscle. Delivery of noncoding RNA species found in CDC-derived exosomes mimics the ability of CDCs and CDC-derived exosomes to increase dystrophin protein levels.