Abstract: A two-stage fuel nozzle assembly for a gas turbine engine. The primary combustion region is centrally positioned and includes a fuel injector that is surrounded by one or more swirl chambers to provide a fuel air mixture that is ignited to define a first stage combustion zone. A secondary combustion region is provided by an annular housing that surrounds the primary combustion region, and it includes a secondary fuel injector having a radially outwardly directed opening and surrounded by an annular ring that includes openings for providing a swirl chamber for the secondary combustion region. Cooling air is directed angularly between the primary and secondary combustion zones to delay intermixing and thereby allow more complete combustion of the respective zones prior to their coalescing further downstream. The primary combustion region is activated during idle and low engine power conditions and both the primary and secondary combustion regions are activated during high engine power conditions.

Abstract: A method and system for detecting and preferably measuring the presence of an activated complement complex in a sample is discussed. The presence of such an activated complex is indicative of complement pathway activation and includes a first complement component and a second complement component. The method uses a first binding agent specific to the first complement component and a second binding agent specific to the second complement component which when bound with the complex forms an aggregate. The second specific binding agent includes a label whose presence is used to detect and measure the amount of aggregate and therefore activated complex in a sample. An assay system and aggregate for use in an assay system are also discussed.

Abstract: A temperature measuring system comprises a sensor which is connected to a supply rail through a first lead, and which may be selectively connected by a relay through a second lead or a third lead to the inverting input of an operational amplifier. The leads have different resistance values. The output of the amplifier is connected to its input through a resistor, and its non-inverting input is connected to the rail through a potential divider. The output of the amplifier is connected to a computer through a low pass filter and an A/D converter. In operation, the output voltage of the amplifier is first measured with the second lead connected to its inverting input and then measured again with the third lead connected. From these measurements the resistance of the sensor is calculated after calculating and hence eliminating the resistance of the leads. The sensed temperature can then be calculated from the resistance of the sensor.