Abstract: A control system provides automated control of gas washout of a patient interface, such as a mask or nasal prongs. A gas washout vent assembly of the system may include a variable exhaust area such as one defined by overlapping apertures of the assembly or a conduit having a variable gas passage channel. The vent assembly may be formed by nested structures, such as conic or cylindrical members, each having an opening of the overlapping apertures. The vent assembly may be attached substantially near or included with the patient interface. An actuator of the assembly, such as a solenoid or voice coil, manipulates an aperture of the vent assembly. The actuator may be configured for control by a controller to change the exhaust area of the vent assembly based on various methodologies including, for example, sleep detection, disordered breathing event detection, rebreathing volume calculation and/or leak detection.

Abstract: A method of managing a computing system (300) includes generating (1702) transaction requests in accordance with a transaction profile of the system (300). The transaction requests are provided for processing by the system (300). Status data of a set of managed resources (102) of the system (300) is collected (1704) in accordance with a system model stored in a knowledge base (204). Performance indicators of the system (300) are determined (1706) from the status data in accordance with the system model. The transaction performance of the system (300) is monitored (1710) by comparing the performance of the system (300) in processing the transaction requests with an expected performance. When a degradation in transaction performance is detected, a signal (1712) is generated to indicate that a degradation in performance has occurred, to enable the status data and/or performance indicators to be analysed at the time at which the performance degradation occurs.

Abstract: A method of managing a computing system (300) includes generating (1702) transaction requests in accordance with a transaction profile of the system (300). The transaction requests are provided for processing by the system (300). Status data of a set of managed resources (102) of the system (300) is collected (1704) in accordance with a system model stored in a knowledge base (204). Performance indicators of the system (300) are determined (1706) from the status data in accordance with the system model. The transaction performance of the system (300) is monitored (1710) by comparing the performance of the system (300) in processing the transaction requests with an expected performance. When a degradation in transaction performance is detected, a signal (1712) is generated to indicate that a degradation in performance has occurred, to enable the status data and/or performance indicators to be analysed at the time at which the performance degradation occurs.

Abstract: A method of managing a computing system (300) includes generating (1702) transaction requests in accordance with a transaction profile of the system (300). The transaction requests are provided for processing by the system (300). Status data of a set of managed resources (102) of the system (300) is collected (1704) in accordance with a system model stored in a knowledge base (204). Performance indicators of the system (300) are determined (1706) from the status data in accordance with the system model. The transaction performance of the system (300) is monitored (1710) by comparing the performance of the system (300) in processing the transaction requests with an expected performance. When a degradation in transaction performance is detected, a signal (1712) is generated to indicate that a degradation in performance has occurred, to enable the status data and/or performance indicators to be analysed at the time at which the performance degradation occurs.