Abstract: A device for handling microfluids comprises at least two layers formed from porous hydrophilic material, to each of which is added hydrophobic material through the thickness of the layer to form a hydrophobic barrier defining the boundaries of a channel, so that a fluid arriving in the channel in the layer can travel along the channel in the plane of the layer bordered by the boundary, which at least two layers are fixed on top of each other by an adhesive substance arranged between the layers so that the fluid can be transferred from the channel of one layer directly to the channel of another layer. The adhesive substance is arranged on the boundary or in its immediate vicinity so that the channel remains free of the adhesive substance.

Abstract: The network system of an orthogonal frequency division multiplexing radio system measures a quality of a signal from a user terminal. At least one compared property of the signal is compared with a predetermined threshold. The comparison includes a comparison involving the measured quality. A number of sub-channels for the user terminal is decreased if each comparison operation indicates that a compared property is at the predetermined threshold or within a predetermined range of the threshold. A control signal about a decrease is transmitted to the user terminal. The user terminal transmits with the decreased number of sub-channels as a response to the control signal.

Abstract: The network system of an orthogonal frequency division multiplexing radio system measures a quality of a signal from a user terminal. At least one compared property of the signal is compared with a predetermined threshold. The comparison includes a comparison involving the measured quality. A number of sub-channels for the user terminal is decreased if each comparison operation indicates that a compared property is at the predetermined threshold or within a predetermined range of the threshold. A control signal about a decrease is transmitted to the user terminal. The user terminal transmits with the decreased number of sub-channels as a response to the control signal.