Abstract: An embodiment aircraft includes a fuselage, a wing coupled to the fuselage, a fixing portion connecting a portion of the wing to the fuselage, and a controller disposed in the fuselage, wherein the controller is configured to transmit a severing signal to cause a portion of the fixing portion to be severed.

Abstract: An embodiment flying vehicle includes a fuel cell installed in a fuselage and configured to supply power to the fuselage and an auxiliary thruster installed in the fuselage and configured to provide an auxiliary thrust force by ejecting combustion gas generated by burning a portion of fuel to be supplied to the fuel cell.

Abstract: An embodiment aircraft includes a fuselage, a wing coupled to the fuselage, a fixing portion connecting a portion of the wing to the fuselage, and a controller disposed in the fuselage, wherein the controller is configured to transmit a severing signal to cause a portion of the fixing portion to be severed.

Abstract: A landing gear system may include: a casing coupled to a fuselage of an aircraft, such as an urban air mobility vehicle; a steering, one side of which is inserted into the casing and the other side of which is connected to a tire; a magnetorheological (MR) damper including a cylinder coupled to the casing and a piston coupled to the steering rod; a sensor unit configured to measure a condition of the urban air mobility vehicle; and a controller configured to control damping force of the MR damper based on measurement data of the sensor unit. The sensor unit may include a first sensor for measuring a stroke of the MR damper and a second sensor for measuring an acceleration of the casing.

Abstract: A landing gear system may include: a casing coupled to a fuselage of an aircraft, such as an urban air mobility vehicle; a steering, one side of which is inserted into the casing and the other side of which is connected to a tire; a magnetorheological (MR) damper including a cylinder coupled to the casing and a piston coupled to the steering rod; a sensor unit configured to measure a condition of the urban air mobility vehicle; and a controller configured to control damping force of the MR damper based on measurement data of the sensor unit. The sensor unit may include a first sensor for measuring a stroke of the MR damper and a second sensor for measuring an acceleration of the casing.

Abstract: There is provided an apparatus for predicting hypotension of a subject. The apparatus comprises a memory configured to store one or more instructions and a pre-trained hypotension prediction model; and a processor configured to execute the one or more instructions stored in the memory, wherein the instructions, when executed by the processor, cause the processor to: determine an arterial blood pressure data of the subject, input the arterial blood pressure data of the subject into the hypotension prediction model, and determine whether the subject has hypotension using an output result of the hypotension prediction model.

Abstract: A radio frequency microelectromechanical (RF MEMS) device can comprise an actuation p-n junction and a sensing p-n junction formed within a semiconductor substrate. The RF MEMS device can be configured to operate in a mode in which an excitation voltage is applied across the actuation p-n junction varying a non-mobile charge within the actuation p-n junction to modulate an electric field acting upon dopant ions and creating electrostatic forces. The electrostatic forces can create a mechanical motion within the actuation p-n junction. The mechanical motion can modulate a depletion capacitance of the sensing p-n junction, thereby creating a motional current. At least one of the p-n junctions can be located at an optimal location to maximize the efficiency of the RF MEMS device at high resonant frequencies.

Abstract: A radio frequency microelectromechanical (RF MEMS) device can comprise an actuation p-n junction and a sensing p-n junction formed within a semiconductor substrate. The RF MEMS device can be configured to operate in a mode in which an excitation voltage is applied across the actuation p-n junction varying a non-mobile charge within the actuation p-n junction to modulate an electric field acting upon dopant ions and creating electrostatic forces. The electrostatic forces can create a mechanical motion within the actuation p-n junction. The mechanical motion can modulate a depletion capacitance of the sensing p-n junction, thereby creating a motional current. At least one of the p-n junctions can be located at an optimal location to maximize the efficiency of the RF MEMS device at high resonant frequencies.