Abstract: A method for user authentication at a client device is described. The method includes obtaining a unique identifier of a user associated with the client device. The method further includes performing a first sequence of operations to register the unique identifier and the client device with a native computing application in accordance with a cryptographic authentication protocol. One or more operations of the first sequence may be performed using a platform-agnostic framework associated with the native computing application. The method further includes performing a second sequence of operations to authenticate the client device and the user of the client device in accordance with the cryptographic authentication protocol. One or more operations of the second sequence may be performed using the platform-agnostic framework. The method further includes accessing the native computing application via the client device based on performing the first sequence of operations and the second sequence of operations.

Abstract: An electronic ballast for controlling the operating behavior and brightness of a gas discharge lamp, includes a full bridge circuit fed with a d.c. voltage (UBUS). The gas discharge lamp is connected as a load of the full bridge circuit, and a control circuit in each case switches on one bridge diagonal and switches off another bridge diagonal of the full bridge circuit, alternatingly. The bridge diagonals each have a regulatable constant current source for regulating a lamp current, and thereby the occurrence of flickering appearances is suppressed. As a result, the lamp can be dimmed over a very wide range of brightnesses.

Abstract: An electronic ballast for controlling the operating behavior and brightness of a gas discharge lamp, includes a full bridge circuit fed with a d.c. voltage (UBUS). The gas discharge lamp is connected as a load of the full bridge circuit, and a control circuit in each case switches on one bridge diagonal and switches off another bridge diagonal of the full bridge circuit, alternatingly. The bridge diagonals each have a regulatable constant current source for regulating a lamp current, and thereby the occurrence of flickering appearances is suppressed. As a result, the lamp can be dimmed over a very wide range of brightnesses.

Abstract: A method of reducing feedbacks on a temporary flow of current drawn from a network, during an operation of an inductive load, by active filtering of harmonics of a network fundamental component with a booster converter (6) and according to which the function of a necessary choke of the booster converter is taken up, at least partially, by the inductive load; and a booster converter for effecting the method, in which the function of the booster converter is integrated into the inductive load driving bridge circuit and into the motor, with at least one motor winding being so connected that it replaces, at least partially, the conventional booster converter choke.