Abstract: A business platform can provide access to applications and provide for the integration of resources with other applications, including internal and external applications, services and systems. A portal framework included within the platform can render portals including graphical user interfaces for displaying and receiving content that can be used by various applications. A portal framework can provide an interface to various resources such that information received and displayed by the portal framework can be exchanged with internal and external resources using standards-based transport protocols, messaging systems, and document types. An integration framework can be invoked to exchange this information among applications and services. An integration framework can provide access to resources by integrating the resources with an application server. The portal framework and integration framework can be implemented on an application server which can support enterprise applications.

Abstract: A system and a method for providing application flow integration in a portal framework. In accordance with one embodiment, the invention comprises a portal servlet, which handles all incoming servlet requests and determines whether the incoming request represents a request either for a portal page or for a non-portal page; and, a portal processor which handles all portal page requests passed by the portal servlet, and executes an appropriate webflow to update the current state of the portal page, depending on a current set of events. Each of a plurality of portlets may have an individual webflow associated with it.

Abstract: Systems and methods are disclosed for providing security for a communities framework in a collaborative computing environment. A community can be provided for maintaining user membership during collaboration. The community can contain various collaboration resources, community services and members having access to the resources and services. A first layer of security can be implemented via membership and functional capabilities. Members can be assigned to various membership capabilities and these membership capabilities can be mapped to functional capabilities in order to control access to the resources by the various members. A second layer of security can be implemented via entitlements and security policies applied to the content repository. Entitlements can be applied at a node level of a content repository. Each node can be evaluated when operations are requested for it.

Abstract: A method and device of magnetic resonance imaging carry out the steps of selecting a trajectory in phase space; expressing that trajectory as a function of variables in a coordinate system suitable for driving gradient coils of an imaging system; performing variable transformation and redefinition to extract a subset of variables varying as a function of time along gradient wave forms but constant from projection to projection; calculating that subset of variables prior to imaging; storing that calculated subset of variables in a memory; and computing online gradient values during imaging with the assistance of said stored subset of variables to significantly reduce wave form memory requirements such that a gradient controller can perform required mathematical functions online.

Abstract: A system, method and media for controlling access to a resource in a distributed computing environment, comprising: receiving a request to access the resource for a principal; determining a role that is appropriate for the principal given the resource; determining whether access to the resource is allowed given the role.

Abstract: A system, method and media for controlling access to a resource in a distributed computing environment, comprising: receiving a request for a principal to access the resource; determining a policy that is appropriate for the principal given the resource; determining whether access to the resource is allowed given the policy.

Abstract: A method for eddy current compensated diffusion imaging using magnetic resonance is used to obtain a spin echo signal in a readout time window by excitation of a nuclear resonance signal using a first radio-frequency pulse and by refocusing that signal using at least one second radio-frequency pulse and a third radio-frequency pulse. Gradients fields are applied in a gradient field direction field having a strength and being activated by gradient pulses between each of said radio-frequency pulses and prior to said readout window, said gradient pulses having a polarity which is alternated between successive gradient pulses, with a totality of said gradient pulses having a gradient time integral of zero between a time of said excitation and the center of kx or k-space. At least two of said gradient pulses have differing gradient time integrals. The gradient direction is then changed and the previous steps repeated to evenly distribute gradient direction vectors over a sphere.

Abstract: A method for eddy current compensated diffusion imaging using magnetic resonance is used to obtain a spin echo signal in a readout time window by excitation of a nuclear resonance signal using a first radio-frequency pulse and by refocusing that signal using at least one second radio-frequency pulse and a third radio-frequency pulse. Gradients fields are applied in a gradient field direction field having a strength and being activated by gradient pulses between each of said radio-frequency pulses and prior to said readout window, said gradient pulses having a polarity which is alternated between successive gradient pulses, with a totality of said gradient pulses having a gradient time integral of zero between a time of said excitation and the center of kx or k-space. At least two of said gradient pulses have differing gradient time integrals. The gradient direction is then changed and the previous steps repeated to evenly distribute gradient direction vectors over a sphere.

Abstract: A method and device of magnetic resonance imaging carry out the steps of selecting a trajectory in phase space; expressing that trajectory as a function of variables in a coordinate system suitable for driving gradient coils of an imaging system; performing variable transformation and redefinition to extract a subset of variables varying as a function of time along gradient wave forms but constant from projection to projection; calculating that subset of variables prior to imaging; storing that calculated subset of variables in a memory; and computing online gradient values during imaging with the assistance of said stored subset of variables to significantly reduce wave form memory requirements such that a gradient controller can perform required mathematical functions online.

Abstract: A method predicting stroke evolution uses magnetic resonance diffusion and perfusion images obtained shortly after the onset of stroke symptoms to automatically estimate the eventual volume of dead cerebral tissue resulting from the stroke. The diffusion and perfusion images are processed to extract region(s) of interest presenting tissue at risk of infarction. A midplane algorithm is also used to calculate ratio and diffusion and perfusion measures for modelling infarct evolution. A parametric normal classifier algorithm is used to predict infarct growth using the calculated measures.