Abstract: A method includes allocating, by a controller to each of a plurality of wireless nodes, at least one initial slot for transmission of new data in a first frame and at least one retransmission slot for retransmission of data in one or more subsequent frames, including allocating to a second wireless node at least a first retransmission slot for data retransmission in one or more frames subsequent to a first frame; determining that there is a failed data transmission from a first wireless node during a first frame; determining that the second wireless node does not need the at least the first retransmission slot; and transmitting a retransmission slot allocation message including information indicating that the at least the first retransmission slot has been allocated to the first wireless node for at least one frame subsequent to the first frame.

Abstract: In a paste type lubrication between a steel wire rope and a rope groove of a pulley, is applied a paste lubricant which contains oil and small solid particles. Solid particles could be of a wide variety sizes and they are small enough to at least partly fit into the valleys between the peaks of surface roughness of the ropes or the rope groove.

Abstract: In a paste type lubrication between a steel wire rope and a rope groove of a pulley, is applied a paste lubricant which contains oil and small solid particles. Solid particles could be of a wide variety sizes and they are small enough to at least partly fit into the valleys between the peaks of surface roughness of the ropes or the rope groove.

Abstract: A power amplifier unit for a transmitter in a mobile communication system is set up so that the operational point of the power amplifier varies in dependence on the instant power level of its input signal. This is used in the context of a variable envelope input signal such that a constant gain of the power amplifier can be achieved by this feedback.

Abstract: The invention relates to a protecting device, especially a welding shield. The protecting device consists of a portion protecting from radiation and sparks, which portion is arranged to rest on the head and at the eyes provide with a protecting glass (3) turnable upwards. To provide a wide field of vision and an intensive protection, the portion (1) protecting from radiation and sparks is manufactured of a transparent material to a continuous portion without openings. Moreover, a visor (2) is turnably journalled to the projecting portion (1), at least a part of which visor is arranged to form the protecting glass (3). The protecting portion (1) can be formed to a helmet-shaped portion protecting the head from all sides.