Abstract: A system and method for high-availability inverse synthetic aperture radar (ISAR). In one embodiment a set of quadratic phase vectors, each corresponding to a different acceleration, is multiplied, one at a time, in a Hadamard product, with a 3-dimensional data cube, and a fast Fourier transform (FFT) is taken of the result, to form a 2-dimensional array. The two-dimensional array is made sparse by setting to zero elements that fall below a threshold based on a coherency metric, and the sparse arrays are stacked to form a sparse 3-dimensional image. Projections of the sparse 3-dimensional image are formed for presentation to an operator or an image exploitation system.

Abstract: A dual pressure shuttle valve assembly is arranged to operate at two different supply pressures and sequence the flow from the two supplies such that the first lower pressure fluid supply is consumed before the second higher pressure fluid supply is utilized in order to maximize downstream function pressure. The shuttle valve assembly includes a shuttle assembly with opposition portions having different valve seat diameters, and having differently sized apertures.

Abstract: A system and method for high-availability inverse synthetic aperture radar (ISAR). In one embodiment a set of quadratic phase vectors, each corresponding to a different acceleration, is multiplied, one at a time, in a Hadamard product, with a 3-dimensional data cube, and a fast Fourier transform (FFT) is taken of the result, to form a 2-dimensional array. The two-dimensional array is made sparse by setting to zero elements that fall below a threshold based on a coherency metric, and the sparse arrays are stacked to form a sparse 3-dimensional image. Projections of the sparse 3-dimensional image are formed for presentation to an operator or an image exploitation system.

Abstract: A programmable computer processing apparatus is connected to a number of servers. Each server stores one or more separate components which, when combined, make up a processing application. Each component specifies any other components which it requires. Computer is arranged to identify a first component needed by an application requested by a user, to fetch the first component from the server storing the component, to fetch any additional components needed by the first component, and to continue fetching components until all of the components required for the application have been fetched. Computer is arranged to install the components in a Java virtual machine using a different classloader for each component and to perform control to permit inter-component interaction and interaction between the components and the resources of computer only in accordance with predefined rules. This prevents unauthorized access by a component to the functionality of another component or computer.

Abstract: A mechanism and method are provided for sending a message digitally signed by a plurality of signatories to one or more recipients. The mechanism can be provided by a mail client or a plug-in for a mail client. A first co-signatory generates an initial message. The initial message includes a content section and a routing section. The routing section can include a signatory field that identifies at least one co-signatory and a recipient field that identifies at least one recipient. The message is digitally signed so as to cover the content section and the routing section. The signatory field in the routing section is used to route the message in turn to each identified co-signatory for signature. The recipient field in the routing section is then used to route the message signed by the plurality of signatories to each identified recipient.

Abstract: An orifice fitting for measuring the flow of gas through a pipeline in which the orifice fitting has a body including a pair of opposing body plates that define a body chamber. Passing through both body plates is an aligned flow passage for attachment to a gas pipeline. One of the body plates includes an access opening that is selectively covered and sealed by a hatch. A carrier having a carrier chamber is movably positioned within the body chamber so that the carrier chamber can be selectively aligned with the flow passage or the access opening. Removably positioned within the carrier chamber is an orifice disk having an orifice of a predetermined size through which gas can flow when the carrier chamber is aligned with the flow passage. The carrier chamber is sealed from the body chamber by seal rings positioned on opposing sides of the carrier and biased against the body plates.