Hewlett-packard Development Company, L.p.

Richard Taylor

Christopher Tofts

Athena Christodoulou

Antonio Lain

Chris Tofts

John William Lumley

Maher Rahmouni

Jason James Brown

Tarek Ben-Ismail

An analysis method takes an input model of a real world process with an output parameter, with multiple input parameters. The complexity of regions of the model is determined to locate regions of low complexity, that is to say low sensitivity of the output parameters to the input parameters. The input parameters may be ordered and the results displayed on view of a two dimensional surface starting with the first parameter and ending with the last. The display may represent the value of the output parameter by the length of a bar on the relevant part of the two dimensional surface. A combination of automatic parameter ordering and/or user input may be used to locate suitable regions.

Processing and display of a real world model

A method of analysing a network having a plurality of computing and infrastructure elements, some of which run agents that monitor one or more network phenomenon, the method comprising the steps of: disabling a selected infrastructure element on which it is not possible to run a monitoring agent; acquiring data from an element adjacent a disabled element; and generating, from the acquired data, a signature representative of the selected element being inoperative.

Network analysis

A method of system design and manufacture includes entering system details in a first user interface program, including in particular availability data. A transfer filedefining a spreadsheet including cells representing the system is created and transferred to a spreadsheet. The spreadsheet calculates both the availability and target availability of the components. The transfer file is arranged to define component count spreadsheet cells to permit user input to vary the numbers of at least some components of the system, and calculation cells to calculate the properties of the system for the component counts entered into the component count cells. The user can then adjust the spreadsheet to obtain a desired result, output the final configuration as output fileand pass the file to a manufacturing facilityto produce the designed system. The system designed and manufactured may be a computer system with many components.

Method and apparatus for calculating required availability of nodes in a tree structure

A web page, including clickthroughs, is cached at a location within a network intermediate a client requesting the page and the host web site for the page. Clickthrough activation (in session cache on the client machine, or in the network cache) causes a javascript program to generate an activation identifier giving the IP address of the machine activating the clickthrough and the time. This ID and an ID for the IP address from which the web page originally hosting the clickthrough was retrieved are sent to the host web site. Generating such identifiers is applicable to text messages, e.g. sent out by a publicity agent, and actuable to connect to a telephone number held by an enterprise within the telephone network. Activating such a text message causes the return of suitable identifiers to the publicity agent to enable them to seek renumeration from the enterprise.

Communication within a communication network

Apparatus for producing an electronic model of a communications network or system having at least one host and a plurality of nodes connected thereto, directly or otherwise, the apparatus comprising means for obtaining data relating to at least some of the nodes and/or the host and means for creating an electronic model of the system or network using the data. The apparatus comprises a trusted computer host for use in analysing the network. The trusted computer host comprises means for detecting nodes on the network. As nodes are detected, sampling probes are inserted at each such node wherever possible. The probes take measurements at the respective nodes and return the resultant data to the trusted computer host. For a case where it is not possible to insert a probe at a detected node, the trusted computer host comprises means for performing traffic analysis and obtaining a profile of behavior between that node and the network host. The data received from the probes and the traffic analysis data is used by model simulation means in the trusted computer host to create a model of the network.

Network system analysis

A method of configuring a supercomputer having a plurality of computing elements, each having an irreducible core computing capability to store and retrieve data, includes the steps of: defining an operating time interval; establishing an desired probability of successful operation over the operating time interval; having regard to the total number of computing elements, configuring each computing element so that, over the operating time interval, the probability of successful operation of the irreducible core capability of each computing elements is greater than, or equal to, the desired probability of successful operation over the operating time interval.

Supercomputing

A method of operating a supercomputer having a plurality of computing elements each connected to a fast communications link is disclosed, the method comprising the steps of: scheduling specified elements to perform computing tasks in specified cycles of a computing operation; in the event of failure of a fast communications link in a given cycle, transferring state from a disabled element no longer able to communicate as a result of the failure to an idle element not scheduled to perform a task in the given cycle; operating the idle element to perform any uncompleted tasks scheduled for the disabled element remaining in the cycle.

A communication system includes a data base storing voice applications corresponding to programs executable by user equipment and user profiles. The voice applications are arranged to provide assistance in relation to the programs. A communication handler causes execution of a voice application from the data base responsive to user identification data.

Communication data method and system for voice applications excecutable by user equipment

Security keys for the provision of a secure service such as content provision are generated in an ancestral hierarchy, so that invalidation of a key in the hierarchy results in a need to reconfigure all other keys in the hierarchy to the extent they share common ancestry. When a user subscription to the service lapses, a decision on invalidation of their key is based in a determination of whether it's more costly to the subscriber to invalidate the key, or continue providing an unpaid-for service. Keys can be allocated to users from domains of the hierarchy on the basis of their economic value to the provider, with higher value users being allocated keys from domains which share fewer common ancestors with other users of other domains than those users share with each other, to minimise inconvenience to high value users of key reconfiguration.

Management of security key distribution

An information technology network comprises a plurality of printers and at least one computing entity which serves as a print manager. The print manager is adapted to process print jobs by distributing the ripping process between two or more different printers, and then returning disparately ripped data to a single printer for physical marking of documents with indicia in accordance with the ripped data.

Method and apparatus for embodying documents

Signals representing a document are supplied by a computer to a printer having a printer processor. The computer supplies to the printer processor (1) instruction data (such as page description language) and (2) resource information indicative of printer processor resources required by the printer at different document printing stages. The printer processor schedules printer processor resources for the different document printing stages in accordance with the resource information, and causes the printer to print the document with the printer processor resources as scheduled. The resource information is provided as comments in page description language located in page headers so the printer learns, in advance of receiving pages of a job, how its resources should be scheduled to prevent printer stalls.

Method of and apparatus for controlling the printing of documents from a computer

Security keys for the provision of a secure service such as content provision are generated in an ancestral hierarchy, so that invalidation of a key in the hierarchy results in a need to reconfigure all other keys in the hierarchy to the extent they share common ancestry. When a user subscription to the service lapses, a decision on invalidation of their key is based in a determination of whether it's more costly to the subscriber to invalidate the key, or continue providing an unpaid-for service. Keys can be allocated to users from domains of the hierarchy on the basis of their economic value to the provider, with higher value users being allocated keys from domains which share fewer common ancestors with other users of other domains than those users share with each other, to minimize inconvenience to high value users of key reconfiguration.

A method of operating a supercomputer having N computing elements each connected to a fast communications link is disclosed, the method comprising the steps of: operating the supercomputer to perform a computing operation; upon failure of a fast communications link transferring state from a computing element which, as a result of the fast communications link failure, is no longer able to communicate, to a spare computing element not previously engaged in the computing operation, and continuing the computing operation with the spare computing element, wherein the number of redundant elements M is chosen to satisfy the expression, ()]&#x3e;where S is a desired probability of successful completion of the computing operation within a time T and P is the probability of successful operation per unit time of a fast communications link.

A computer network comprises plural computer systems connected to plural printers. Each computer system comprises at least one application program for generating print data for one or more of the printers. One of the computer systems is partially employed as a stock control computer. An application program stored on the stock control computer runs a model of the overall system, including maintaining an up-to-date schedule of all print jobs on the system, and maintains a log of all media resources (i.e., paper) available to each printer. The application program ensures that the printers have suitable media resources and/or that print jobs are allocated to printers where appropriate media resources are available, if possible.

Method of, computer program for, and system for maintaining print system media resources

Information services may be provided to a user of a personal digital assistant (PDA) via an infra red wireless communication port. The PDA recruits communication with a peer, such as a beacon, via this link, and the PDA and peer exchange messages containing the URLs of their proxies within the Internet. The proxies contact each other and negotiate, via the exchange of XML documents, parameters governing exchange of messages via the infra red link, such parameters being related inter alia to technical aspects of communication (e.g. file size, software compatibility etc.), encryption (e.g. public key information), and policy, which determines what the IR wireless link may be employed for, such as what content is sought. Negotiation between proxies is relatively rapid due to the higher bandwidth of the link between them in comparison to the IR link.

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Bristol, United Kingdom

Richard Taylor