Abstract: A method for calibrating a radio-based keyless access system of a transportation vehicle, an access system, and a corresponding transportation vehicle. Based on a measured field strength of an LF field, it is determined whether the signal transmitter is located at most at a specified distance from the transportation vehicle. A second transmission device emits a higher-frequency calibration signal in response to which the signal transmitter transmits a response signal back to the transportation vehicle. A reference distance from the signal transmitter to the transportation vehicle is automatically determined from the propagation time of the calibration signal and the response signal. The measured LF field strength-based determination of whether the signal transmitter is located at most at a specified distance from the transportation vehicle is then calibrated automatically based on the determined reference distance.

Abstract: The performance of an action for a transportation vehicle, wherein a relay attack is prevented. In response to a transmission of a first radio signal at a first frequency, on the one hand, a second radio signal at a second frequency is received from an ID transponder authorized for the transportation vehicle and, on the other hand, a further radio signal at the first frequency is received. The action is performed for the transportation vehicle only in response to the second radio signal originating from an ID transponder authorized for the transportation vehicle and only in response to the signal strength of the further radio signal lying below a predefined signal strength threshold.

Abstract: An apparatus, a key partner, methods and computer programs for a key module of a vehicle and a vehicle. The apparatus for the key module includes a communication interface for radio communication with a key partner of the vehicle, a motion sensor, and a control module for controlling an operating state from operating states of the key module based on the information about the motion of the key module. The operating states include at least a first operating state, a pre-shutdown operating state and a shutdown state. The control module activates the first operating state if the motion of the key module is above a motion limit value and activates the pre-shutdown operating state if the motion of the key module is below the motion limit value over a period of time.

Abstract: A method for measuring a temperature inside a kitchen appliance, in particular a temperature of an item to be cooked, inside a kitchen appliance, includes: transmitting an electromagnetic excitation signal using a transmission-receiving device, receiving the excitation signal by a temperature sensor, which is arranged in the kitchen appliance, in particular in the item to be cooked, transmitting a temperature-dependent response signal by the temperature sensor, receiving the response signal by the transmission-receiving device, determining the current temperature by comparing the response signal to temperature-dependent reference signals. To also provide for an interaction between a plurality of kitchen appliances, the transmission-receiving device transmits the response signal or partial information of the response signal and/or the value of a current temperature, which is determined by the transmission-receiving device, to a control device of a further kitchen appliance or to an external processor.

Abstract: The invention relates to a method for measuring a temperature inside a kitchen appliance (1), in particular of a temperature of an item to be cooked of an item to be cooked (21), which is to be prepared inside a kitchen appliance (1), comprising the method steps: transmitting an electromagnetic excitation signal by means of a transmission-receiving device (2), receiving the excitation signal by a temperature sensor (3), which is arranged in the kitchen appliance (1), in particular in the item to be cooked (21), transmitting a temperature-dependent response signal by the temperature sensor (3), receiving the response signal by the transmission-receiving device (2), determining the current temperature by comparing the response signal to temperature-dependent reference signals.

Abstract: The amount of propionic acid produced in the process of oxidizing propane to acrylic acid is reduced by using a reactor with a length/diameter ratio >10 and/or maintaining the difference between the target reaction temperature and the peak temperature within the reactor to less than 20° C.

Abstract: The amount of propionic acid produced in the process of oxidizing propane to acrylic acid is reduced by using a reactor with a length/diameter ratio >10 and/or maintaining the difference between the target reaction temperature and the peak temperature within the reactor to less than 20° C.