Abstract: A method determines a thrust force of an aircraft engine that is attached to an aircraft by a force transferring element having a strain gauge for determining its strain state and a temperature sensor for measuring a surface temperature of the force transferring element adjacent to the strain gauge. The method includes: determining the surface temperature; determining a strain of the force transferring element; determining the strain state of the force transferring element based on the determined strain and compensating for temperature effects by taking into account the surface temperature, the compensation of the temperature effects taking into account both static and transient influences; and calculating the thrust force of the aircraft engine from the determined strain state.

Abstract: A method is disclosed in which a challenge from a locker system is transmitted to a mobile device. A response is received from the mobile device at the locker system, and the response was generated by a backend system, which received the challenge from the mobile device, at least based on the challenge received by the backend system and on a first key stored at the backend system and has been transmitted to the mobile device. At the locker system, it is checked whether the received response was generated under usage of at least the challenge and a key that corresponds to a second key stored at the locker system. Access is granted to a compartment of the locker system at least depending on a result of the checking. Further disclosed are methods performed by the mobile device and the backend system, and according apparatuses pertaining to these methods.

Abstract: A method determines a thrust force of an aircraft engine that is attached to an aircraft by a force transferring element having a strain gauge for determining its strain state and a temperature sensor for measuring a surface temperature of the force transferring element adjacent to the strain gauge. The method includes: determining the surface temperature; determining a strain of the force transferring element; determining the strain state of the force transferring element based on the determined strain and compensating for temperature effects by taking into account the surface temperature, the compensation of the temperature effects taking into account both static and transient influences; and calculating the thrust force of the aircraft engine from the determined strain state.

Abstract: A method is disclosed in which a challenge from a locker system is transmitted to a mobile device. A response is received from the mobile device at the locker system, and the response was generated by a backend system, which received the challenge from the mobile device, at least based on the challenge received by the backend system and on a first key stored at the backend system and has been transmitted to the mobile device. At the locker system, it is checked whether the received response was generated under usage of at least the challenge and a key that corresponds to a second key stored at the locker system. Access is granted to a compartment of the locker system at least depending on a result of the checking. Further disclosed are methods performed by the mobile device and the backend system, and according apparatuses pertaining to these methods.

Abstract: An electric heater is provided that includes at least two groups of heating elements which change their temperature by electrical power consumption, comprising a control unit with two switch arrangements such that the first switch arrangement includes at least two power switches for switching the at least two groups of heating elements in a High-side connection and such that the second power switch arrangement includes at least two switches for switching the at least two groups of heating elements in a Low-side connection.

Abstract: An electric heater is provided that includes at least two groups of heating elements which change their temperature by electrical power consumption, comprising a control unit with two switch arrangements such that the first switch arrangement includes at least two power switches for switching the at least two groups of heating elements in a High-side connection and such that the second power switch arrangement includes at least two switches for switching the at least two groups of heating elements in a Low-side connection.