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Method and apparatus for resource allocation when schedule changes are incorporated in real time

A plurality of resources, typically service operatives, are allocated to a plurality of tasks by a method in which initial information relating to the tasks to be allocated and the resources available to perform the tasks is provided. An initial series of schedules is first generated allocating resources to the tasks, and then modifying the individual schedule of at least one resource in response to updated information. Changes to individual schedules may be made in response to such updated information independently of the schedule generation. The initial, series of schedules may be generated in a two-stage process in which a rule-based system allocates tasks selected as being difficult to allocate (e.g., because they are linked to other tasks). then a stochastic (non-systematic) search system compiles the rest of the schedule. Periodically, the stochastic system may be interrupted to allow a further rule-based system to analyze the schedules created thus far, and fix the best ones in the schedule, so that the stochastic system can then concentrate on improving the remaining schedules. In order to allow the system to handle rapid changes in the requirements for tasks and the resources, on a scale faster than the time required to generate the schedules, a schedule modification system is arranged to make changes in the short term in between schedule updates delivered by the schedule generation system.
Owner:TRIMBLE MRM

Authentication watermarks for printed objects and related applications

The disclosure describes systems for creating and authenticating printed objects using authentication and copy detection watermarks. For example, one verification system includes a watermark decoder and a verification module. The watermark decoder detects a copy detection watermark in a printed object to determine whether the printed object has been reproduced. The verification module processes a message decoded from an authentication watermark on the printed object to authenticate the printed object or bearer of the printed object. The authentication and copy detection watermarks may be implemented as the same or different watermarks. For example, the copy detection watermark may be a fragile watermark that carries the message and that degrades in response to a reproduction operation, such as photocopying or scanning and then reprinting the object. Alternatively, the authentication and copy detection watermarks may be separate watermarks embedded in an image that is printed on the object. The authentication watermark, in some applications, includes an identifier that links the object to a database entry with related information about the object. This related information can be used to check the bearer of the object by comparing it with attributes of the bearer (such as a user ID or photo) or the validity of the object by comparing it with attributes that are visible or machine readable on the object.
Owner:INTUIT INC

Authentication watermarks for printed objects and related applications

The disclosure describes systems for creating and authenticating printed objects using authentication and copy detection watermarks. For example, one verification system includes a watermark decoder and a verification module. The watermark decoder detects a copy detection watermark in a printed object to determine whether the printed object has been reproduced. The verification module processes a message decoded from an authentication watermark on the printed object to authenticate the printed object or bearer of the printed object. The authentication and copy detection watermarks may be implemented as the same or different watermarks. For example, the copy detection watermark may be a fragile watermark that carries the message and that degrades in response to a reproduction operation, such as photocopying or scanning and then reprinting the object. Alternatively, the authentication and copy detection watermarks may be separate watermarks embedded in an image that is printed on the object. The authentication watermark, in some applications, includes an identifier that links the object to a database entry with related information about the object. This related information can be used to check the bearer of the object by comparing it with attributes of the bearer (such as a user ID or photo) or the validity of the object by comparing it with attributes that are visible or machine readable on the object.
Owner:INTUIT INC

Managing cache coherency in a data processing apparatus

A data processing apparatus and method are provided for managing cache coherency. The data processing apparatus comprises a plurality of processing units, each having a cache associated therewith, and each cache having indication circuitry containing segment filtering data. The indication circuitry is responsive to an address portion of an address specified by an access request from an associated processing unit to reference the segment filtering data in order to provide, for each of at least a subset of the segments of the associated cache, an indication as to whether the data is either definitely not stored in that segment or is potentially stored in that segment. Further, in accordance with the present invention, cache coherency circuitry is provided which employs a cache coherency protocol to ensure data accessed by each processing unit is up-to-date. The cache coherency circuitry has snoop indication circuitry associated therewith whose content is derived from the segment filtering data of each indication circuitry. For certain access requests, the cache coherency circuitry initiates a coherency operation during which the snoop indication circuitry is referenced to determine whether any of the caches require subjecting to a snoop operation. For each cache for which it is determined a snoop operation should be performed, the cache coherency circuitry is arranged to issue a notification to that cache identifying the snoop operation to be performed. By taking advantage of information already provided in association with each cache in order to form the content of the snoop indication circuitry, significant hardware cost savings are achieved when compared with prior art techniques. Further, through use of such an approach, it is possible in embodiments of the present invention to identify the snoop operation not only on a cache-by-cache basis, but also for a particular cache to identify which segments of that cache should be subjected to the snoop operation.
Owner:ARM LTD
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