Abstract: An interrupt controller comprises issue circuitry to issue interrupt requests to a processing element and control circuitry to detect presence of a race condition in association with at least one pending interrupt request to be issued, and to set a barrier indicator when the race condition has been resolved. In response to the race condition being present, the issue circuitry is configured to select one of the at least one pending interrupt requests, to issue to the processing element the selected pending interrupt request followed by a dummy request over a path that ensures that the processing element receives the selected pending interrupt request prior to receiving the dummy request. On receiving an acknowledgement indicating that the processing element has received the dummy request, the control circuitry is then configured to set the barrier indicator.

Abstract: A method and apparatus (1) for treating a filter (2) for filtering particulate matter from exhaust gas and a treated filter (2) are described. A reservoir (3) containing a dry powder (4) is provided. A vacuum generator (6) establishes a primary gas flow through a porous structure of the filter (2) by applying a pressure reduction to an outlet face of the filter (2). A spray device (7) receives the dry powder (4) from a transport device (8) and sprays the dry powder (4) towards the inlet face of the filter (2). A controller (9) is configured to control operation of at least the vacuum generator (6) and the spray device (7). The dry powder (4) comprises or consists of a metal compound for forming by thermal decomposition a metal oxide.

Abstract: Methods, systems, and computer readable media for minimal-latency tracking and display for matching real and virtual worlds in head-worn displays are disclosed. According to one aspect, a method for minimal-latency tracking and display for matching real and virtual worlds in head-worn displays includes calculating a desired image, calculating an error image as the difference between the desired image and an image currently being perceived by a user, identifying as an error portion a portion of the error image having the largest error, updating a portion of a projected image that corresponds to the error portion, and recalculating the image currently being perceived by a user based on the updated projected image.

Abstract: A repairable seal assembly for deployment at a wellbore includes an elongate body, a first seal carried by the elongate body and configured to seal against an adjacent surface, and a transitional component carried by the elongate body. The transitional component is adjustable from a first configuration in which the transitional component defines a gap between the transitional component and the adjacent surface to a second configuration in which the transitional component contacts the adjacent surface to form a second seal at the adjacent surface.

Abstract: The invention relates to a new method of characterising a target RNA polynucleotide by taking one or more measurements as the target RNA polynucleotide moves with respect to a transmembrane pore. The movement is controlled by a DNA helicase. The invention also relates to a modified RNA construct wherein the RNA polynucleotide has been modified to increase DNA helicase binding thereto.

Abstract: Circuitry comprises a data store to hold status data indicating a status of a first set of one or more devices connected to the interconnect circuitry; and control circuitry, responsive to initiation of a data handling transaction, to generate recovery data indicative of an initial state of the status data and to predict a predicted revised state of the status data applicable to resolution of the data handling transaction; the control circuitry being configured to change the status data to the predicted revised state in response to initiation of the transaction and before resolution of the transaction, and in response to a request to access the status data between the change of the status data to the predicted revised state and the resolution of the transaction, to provide access to the initial state of the status data, using the recovery data.

Abstract: The invention relates to a new method of delivering an analyte to a transmembrane pore in a membrane. The method involves the use of microparticles.

Abstract: A semi-autonomous downhole taxi with fiber optic communication is described. The taxi includes a housing configured to travel within a horizontal section of a wellbore. A docking station is detachably attached to the housing. The docking station is configured to couple to a wireline to pass the taxi through a vertical section of the wellbore. The docking station is configured to be detached from and re-attached to the housing. A fiber optic cable spool is attached to and carried by the housing. A fiber optic cable is wound on the fiber optic cable spool. The fiber optic cable mechanically connects the docking station and the housing. The fiber optic cable is configured to unspool from the fiber optic cable spool as the housing, detached from the docking station, travels through the horizontal section of the wellbore. The fiber optic cable is configured to pass data between the docking station and the housing.

Abstract: Circuitry comprises a set of two or more data handling nodes each having respective storage circuitry to hold data; and a home node to serialise data access operations and to control coherency amongst data held by the one or more data handling nodes so that data written to a memory address is consistent with data read from that memory address in response to a subsequent access request; in which: a requesting node of the set of data handling nodes is configured to communicate a request to the home node for exclusive access to a given instance of data at a given memory address; and the home node is configured, in response to the request, to communicate information to other data handling nodes of the set of data handling nodes to control handling, by those other data handling nodes, of any further instances of the data at the given memory address which are held by those other data handling nodes.

Abstract: An interconnect apparatus comprises first node circuitry for performing first node operations to service data access requests in respect of a first range of memory addresses and second node circuitry for performing second node operations to service data access requests in respect of a second range of memory addresses. The interconnect comprises interface circuitry to: receive a retry indication in respect of a data access request from the first node and forward the retry indication to the requester circuitry; responsive to determining that the interface circuitry has capacity for the data access request, transmit a reissue capacity message to the requester circuitry; receive a reissued data access request from the requester circuitry; and issue the reissued data access request to the second node circuitry. The second node circuitry is responsive to receiving the reissued data access request to service the data access request.

Abstract: A biochemical analysis system analyses polymers by taking measurements of a polymer from a sensor element comprising a nanopore during translocation of the polymer through the nanopore. When a polymer has partially translocated, the series of measurements is analysed using reference data derived from a reference sequence to provide a measure of similarity. Responsive to the measure of similarity, the sensor element may be selectively operated to eject the polymer and thereby make the nanopore available to receive a further polymer. Where the biochemical analysis system comprises an array of sensor elements and is takes measurements from sensor elements selected in a multiplexed manner, responsive to the measure of similarity, the biochemical analysis system ceases taking measurements from the currently selected sensor element and to starts taking measurements from a newly selected sensor element.

Abstract: A method of measuring two or more fluid phases of in a downhole well bore that comprises measuring a flow of each of the two or more phases at respective offtake points at which the two or more phases are unmixed within the well bore. In certain implementations, the well bore is inclined at 20 degrees or less to a horizontal axis. Each of the two or more phases can flow at a rate to achieve low Reynolds numbers in a laminar flow regime.

Abstract: Data harmonization across one or more building lifecycles. In an embodiment, a plurality of building information modeling (BIM) objects. At least a subset of the BIM objects comprises higher-level BIM objects that represent assemblies of lower-level BIM objects, at least a subset of the lower-level BIM objects represents manufactured products, and at least a subset of the higher-level BIM objects represents a modular portion of a building. The plurality of BIM objects is stored in a BIM object database on a central server system, and access is provided to the plurality of BIM objects to a plurality of remote software applications via at least one network.

Abstract: A flow meter includes a cylindrical tubing configured to be positioned in a wellbore, the cylindrical tubing including a flow mixer configured to produce a turbulent fluid flow of a multiphase fluid in the wellbore. The flow meter includes a tuning fork disposed in the cylindrical tubing separate from the flow mixer, the tuning fork configured to contact the turbulent fluid flow of the multiphase fluid and vibrate at a vibration frequency in response to contact with the turbulent fluid flow, and a controller to determine a fluid density measurement of the multiphase fluid based at least in part on the vibration frequency of the tuning fork.

Abstract: An aspect of the present disclosure is a photoelectrochemical device that includes a first cell that includes a first semiconductor alloy, a capping layer that includes a second semiconductor alloy, and a passivating layer that includes a third semiconductor alloy, where the passivating layer is positioned between the first cell and the capping layer, and at least a portion of the capping layer is configured to be in direct contact with an electrolyte.

Abstract: A vehicular exhaust filter (2) comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter (2) is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.

Abstract: A method and apparatus (1) for treating a filter (2) for filtering particulate matter from exhaust gas. A reservoir (3) containing a dry powder (4) is provided. A vacuum generator (6) establishes a primary gas flow through a porous structure of the filter (2) by applying a pressure reduction to an outlet face of the filter (2). A spray device (7) receives the dry powder (4) from a transport device (8) and sprays the dry powder (4) towards the inlet face of the filter (2). A controller (9) is configured to control operation of at least the vacuum generator (6) and the spray device (7).

Abstract: A method for performing a well intervention operation includes the steps of: (a) sealingly coupling a lubricator onto an open top end of a well tree, the lubricator having a hollow interior in which a rotatable winch is contained, the winch having a cable wound thereabout; (b) attaching a tool to the cable; (c) lowering the tool within a well bore to which the well tree is attached; and (d) operating the winch from a location exterior to the lubricator to cause rotation of the winch and winding of the cable, whereby the tool is retrieved from the wellbore.

Abstract: A method of measuring two or more fluid phases in a downhole well bore that comprises measuring a flow of each of the two or more phases at respective ports at which the two or more phases are unmixed within the well bore. In certain implementations, the well bore is inclined at 20 degrees or less to a horizontal axis. Each of the two or more phases can flow at a rate to achieve low Reynolds numbers in a laminar flow regime.

Abstract: An interconnect apparatus comprises first node circuitry for performing first node operations to service data access requests in respect of a first range of memory addresses and second node circuitry for performing second node operations to service data access requests in respect of a second range of memory addresses. The interconnect comprises interface circuitry to: receive a retry indication in respect of a data access request from the first node and forward the retry indication to the requester circuitry; responsive to determining that the interface circuitry has capacity for the data access request, transmit a reissue capacity message to the requester circuitry; receive a reissued data access request from the requester circuitry; and issue the reissued data access request to the second node circuitry. The second node circuitry is responsive to receiving the reissued data access request to service the data access request.