The device for diffusing volatile substances comprises two containers to hold respective liquids with respective volatile substances. The light emitting device has light emitting chip and a first layer covering the light emitting chip. If the dependencies are not present, a client device upon which the application is executing is configured such that the dependencies are present and are made available only to the authorized application. Initial connections are formed between various input branches and various inputs and a set of the inputs are activated. Head faces of the front-face electrodes, or bump electrodes connected to the respective head faces of the front-face electrodes serve as electrodes for external connections to another substrate, element, or the like. In one embodiment the branch metric includes determining a set of branch metric values for symbols of a received digital signal, the branch metric values indicating a correlation between symbols obtained using a reduced calculation set, the reduced calculation set being obtained by adding a common term to all of the branch metric values before determining the correlation.