Abstract: An exhaust gas heat exchanger comprising an external shell (20) extending between two tube plates (30, 31) and defining a coolant chamber; internal tubes (38) forming exhaust gas passages which extend between the tube plates (30, 31); an exhaust gas manifold divided by a baffle plate (29) into first and second chambers (26, 28) with an exhaust gas inlet (25) and outlet (27) respectively. The baffle plate (29) is provided with a valve (51) which can be operated between an open position, which exhaust gas flows along the cooling tubes (38), and a closed position, in which exhaust gas is diverted directly from the first chamber (26) to the second chamber (28).

Abstract: An exhaust gas recirculation cooler (1) with a coolant chamber (14), a bypass tube (50) and means (70) to selectively direct exhaust gas through the coolant chamber (14) or bypass tube (50). The bypass tube (50) may be used to direct hot exhaust gases to the engine under low engine temperature/load operating conditions and during start up of the engine; the coolant chamber (14) may be used to cool very hot gases under high engine temperature/load conditions and direct the cooled gas to the engine. The bypass tube (50) is integrally formed with the coolant chamber, reducing space required for the cooler and making for easier installation.

Abstract: A gage assembly for measuring a distance d from an end edge of a blade segment to a center location of a groove formed in the segment comprising a gage body having at least two reference surfaces adapted to engage edges of the segment; a dial indicator gage having a dial and a stem, the stem passing through a portion of the gage body; and a slide gage adapted for insertion into the groove, the slide gage fitted with an element that, in use, aligns with the stem of the dial indicator gage.

Abstract: Poly(ADP)-ribose polymerase (PARP) becomes activated at sites of DNA damage and is thought to promote repair by modifying local chromatin proteins and transcription factors. Disclosed is an isoform of PARP, PARP-e, which lacks enzymatic function and which is encoded by a gene having a novel structure. Also disclosed are methods of modulating chromatin structure resulting in modulation of gene activation, gene repression and chromatin condensation and decondensation.

Abstract: A gage assembly for measuring a distance d from an end edge of a blade segment to a center location of a groove formed in the segment comprising a gage body having at least two reference surfaces adapted to engage edges of the segment; a dial indicator gage having a dial and a stem, the stem passing through a portion of the gage body; and a slide gage adapted for insertion into the groove, the slide gage fitted with an element that, in use, aligns with the stem of the dial indicator gage.

Abstract: An exhaust gas recirculation cooler (1) with a coolant chamber (14), a bypass tube (50) and means (70) to selectively direct exhaust gas through the coolant chamber (14) or bypass tube (50). The bypass tube (50) may be used to direct hot exhaust gases to the engine under low engine temperature/load operating conditions and during start up of the engine; the coolant chamber (14) may be used to cool very hot gases under high engine temperature/load conditions and direct the cooled gas to the engine. The bypass tube (50) is integrally formed with the coolant chamber, reducing space required for the cooler and making for easier installation.

Abstract: An exhaust gas heat exchanger comprising an external shell (20) extending between two tube plates (30, 31) and defining a coolant chamber; internal tubes (38) forming exhaust gas passages which extend between the tube plates (30, 31); an exhaust gas manifold divided by a baffle plate (29) into first and second chambers (26, 28) with an exhaust gas inlet (25) and outlet (27) respectively. The baffle plate (29) is provided with a valve (51) which can be operated between an open position, in which exhaust gas flows along the cooling tubes (38), and a closed position, in which exhaust gas is diverted directly from the first chamber (26) to the second chamber (28).

Abstract: A process and apparatus for scheduling reservations across a communications networks receives a plurality of connection requests specifying a time for the connection, and attempts to find a route for the connection. If an available route is found, the connection is reserved in advance. Unscheduled connection requests are stored in the list, which is generated as a display view at a graphical user interface. Similarly, reserved connections are stored in another list which forms a basis for a display view of reserved connections. The list of reserved connections is used by a network controller to implement the reserved connections at the appropriate times.

Abstract: A method of managing a communications network is described which makes use of information about the current state of the network and in addition, information about past and/or future states of the network. Information about the current state of the network is stored in a management information base (MIB) and the information about the past/future states is either stored in this MIB, or separate past/future MIBs are created. The information about the past/future states is stored in a way such that it can be operated on in the same way as the information about the current state of the network. By storing the information in this way management of the network is improved. For example, future states of the network can be tested before being implemented. Also, information about past states can be used to predict future states. Fault management, configuration management, accounting management and performance management can all be improved by using the information about past/future states.

Abstract: A liquid-filled cooling fin generally includes two roughly rectangular opposing fin walls separated by a relatively thin liquid space or chamber. In this invention the fin walls have reinforcing ripples to increase fin wall rigidity and resistance to deformation. The opposing walls are sealed at both ends along the depth of the fin and at one of the two edges along the height of the fin. The second, open edge of the fin is attached along the height of the fin in a liquid tight seal to a tank in which a transformer or other heat generating device to be cooled is submerged in a cooling fluid. The tank is provided with holes or other fluid passages so that cooling fluid can circulate between the tank and the fin. Cooling fluid is heated in the tank by the transformer and flows from the tank to the cooling fins, where it is then cooled by transferring heat through the fin walls to ambient air.

Abstract: In an electrostatic copying apparatus, background toner particle removal is enhanced by employing a corona emission device between a development station and a background toner removal station. The corona emissions are such as to substantially reduce the background residual potential on a photoconductor and ensure that all background particles on the photoconductor are of a polarity opposite to the polarity of the charge on the latent image whereby toner particles may be more easily removed from the photoconductor surface.