Abstract: Preemption in wireless may be provided. Access Category (AC) parameters may be received for a preemption AC within a plurality of ACs. The preemption AC parameters may comprise a Contention Window maximum (CWmax) comprising a first predetermined value and a preemption Arbitrary Interframe Space Number (AIFSN) of less than or equal to a second predetermined value. AC parameters for others of the plurality of ACs may be received wherein a non-preemption AIFSN associated with any of the others of the plurality of ACs is greater than a sum of the first predetermined value the second predetermined value. Preemption for traffic in the preemption AC may be allowed.

Abstract: A retrieval tool and method for retrieving a remote tool with a threaded connection from a remote location. The retrieval tool includes a rotational drive member which rotates an attachment sub having a complimentary threaded portion. An articulated shaft assembly permits the attachment sub to move laterally and angularly with respect to the axis of the rotational drive member. A fluid conduit supplies fluid pressure for releasing the remote tool.

Abstract: A retrieval tool and method for retrieving a remote tool with a threaded connection from a remote location. The retrieval tool includes a rotational drive member which rotates an attachment sub having a complimentary threaded portion. An articulated shaft assembly permits the attachment sub to move laterally and angularly with respect to the axis of the rotational drive member. A fluid conduit supplies fluid pressure for releasing the remote tool.

Abstract: A humdification chamber for the humidification of respiratory gases has particular application for use over extended time periods with infrequent refills.The humidification chamber has a heated reservoir and a supply reservoir, the heated reservoir adapted to be in thermal contact with a heater base to which the humidification chamber is attached. A partition separates the heated reservoir from the supply reservoir, the partition having a gas flow path and a liquid flow path, the flow paths allowing gas and liquid communication respectively between the supply and heated reservoirs. The partition substantially thermally insulates the supply reservoir from the heater base. A gas inlet port and a gas outlet port are provided in the top surface of the humidification chamber to allow gases to be humidified to circulate through the chamber above the heated reservoir.