Abstract: A system for controlling blade clearances within a gas turbine engine includes a rotor disk and a rotor blade coupled to the rotor disk. Additionally, the system includes an outer turbine component positioned outward of the rotor blade such that a clearance is defined between the rotor blade and the outer turbine component. Furthermore, the system includes a heat exchanger configured to receive a flow of cooling air bled from the gas turbine engine and transfer heat from the received flow of the cooling air to a flow of coolant to generate cooled cooling air. Moreover, the system includes a valve configured to control the flow of the coolant to the heat exchanger. In this respect, the cooled cooling air is supplied to at least one of the rotor disk or the rotor blade to adjust the clearance between the rotor blade and the outer turbine component.

Abstract: A gas turbine engine including: a fan assembly comprising a fan; and a turbomachine drivingly coupled to the fan and including a compressor section, a combustion section, and a turbine section arranged in serial flow order and defining in part a working gas flowpath, the gas turbine engine defining a bypass passage over the turbomachine; the turbomachine further including a heat exchanger and defining an annular cooling passage extending between an inlet and an outlet, the inlet in airflow communication with the working gas flowpath at a location upstream of the compressor section and the outlet in airflow communication with the bypass passage, the heat exchanger in thermal communication with an airflow through the cooling passage.

Abstract: A system for providing guidance to collaboration participants in a collaboration space, the system comprising facilitator database storing characterizing rules for assessing conditions of a collaborative activity; a monitor associated with the collaboration space, the monitor configured to obtain information associated with the collaboration space that is indicative of conditions related to a collaborative activity performed within the collaborative space; a status device; and a processor linked to the facilitator database, the monitor and the status device, the processor programmed to perform the steps of: obtaining information from the monitor; accessing the characterizing rules; comparing the obtained information to the characterizing rules to assess conditions related to the collaborative activity; and based on the comparison, controlling the status device to indicate conditions of the collaborative activity.

Abstract: Method and apparatus for testing in a communication network is described. One example of the invention relates to a method of testing in a voice over internet protocol (VOIP) network. At least one test script is obtained from the VOIP network at an enhanced terminal adapter. The enhanced terminal adapter is configured to couple at least one communication device to the VOIP network. The at least one test script is executed within a scripting framework of the enhanced terminal adapter to interact with at least one component coupled to the VOIP network. Results of the execution of the at least one test script are transmitted from the enhanced terminal adapter to the VOIP network.

Abstract: Method and apparatus for testing in a communication network is described. One example of the invention relates to a method of testing in a voice over internet protocol (VOIP) network. At least one test script is obtained from the VOIP network at an enhanced terminal adapter. The enhanced terminal adapter is configured to couple at least one communication device to the VOIP network. The at least one test script is executed within a scripting framework of the enhanced terminal adapter to interact with at least one component coupled to the VOIP network. Results of the execution of the at least one test script are transmitted from the enhanced terminal adapter to the VOIP network.