Abstract: A firewall uses information about an application that originates a network request to determine whether and how to forward the request over a network. The firewall may more generally rely on the identity of the originating application, the security state of the originating application, the security state of the endpoint, and any other information that might provide an indication of malicious activity, to make routing and forwarding decisions for endpoint-originated network traffic.

Abstract: A threat management facility detects a device on an enterprise network and determines whether the device is one of a set of managed devices for the enterprise network. When the device is not one of the set of managed devices, the threat management facility may selectively direct the device to a portal that provides support to the user of the device while the device awaits admission to the enterprise network. As the user interacts with the portal, the portal may manage admission of unrecognized devices onto the enterprise network while making efficient use of network administrator resources.

Abstract: A method comprises storing pixel data in a frame buffer, retrieving the pixel data from the frame buffer and processing at least one pixel value of the pixel data to generate an output pixel bit stream. The method further comprises storing pixel values in a first update buffer. The pixel values are derived from the output pixel bit stream. The method also comprises providing the pixel values from the first update buffer across a network to a remote graphics system.

Abstract: A method comprises storing pixel data in a frame buffer, retrieving the pixel data from the frame buffer and processing at least one pixel value of the pixel data to generate an output pixel bit stream. The method further comprises storing pixel values in a first update buffer. The pixel values are derived from the output pixel bit stream. The method also comprises providing the pixel values from the first update buffer across a network to a remote graphics system.

Abstract: A rotary valve (10) of an internal combustion engine, of the hollow cylindrical type for rotation in the bore (20) of the cylinder head of the engine, the valve (10) having oil and gas seals (17,14) to prevent leakage of oil to the combustion chamber and leakage of gas from the combustion chamber, each gas seal being of the piston ring type and each oil seal consisting of a non-rotating annular member (17), a seal (21) between it and the bore in which the valve (10) rotates, an annular cavity (24) lying peripherally in a small radial clearance between the valve (10) and the bore (20) and extending between the gas sealing ring (14) and the seal (21) on the annular member (17), the annular member (17) having a substantially radially disposed face (18) arranged to seal slidingly against a radially disposed face (19) on the valve (10), the quality of these faces (18,19) being such as to allow migration of oil between them but sufficient when combined with the radial depth of the faces (18,19) to prevent oil from