Abstract: There is provided a head wearable air purifier comprising a first speaker assembly and a second speaker assembly, wherein the first speaker assembly comprises a filter assembly, an impeller for creating an airflow through the filter assembly, a motor arranged to drive the impeller and an air outlet downstream from the filter assembly for emitting a filtered airflow from the first speaker assembly. The head wearable air purifier further comprises a nozzle arranged to receive the filtered airflow from the first speaker assembly, the nozzle comprising an air outlet arranged to emit the received filtered airflow from the head wearable air purifier. The impeller is a mixed flow impeller that has a generally conical or frusto-conical shape, and both the impeller and the motor are disposed within an impeller casing that is generally frusto-conical in shape.

Abstract: There is provided a head wearable air purifier comprising a first speaker assembly and a second speaker assembly, wherein the first speaker assembly comprises a filter assembly, a motor-driven impeller for creating an airflow through the filter assembly, and an air outlet downstream from the filter assembly for emitting a filtered airflow from the speaker assembly. The head wearable air purifier further comprises a nozzle arranged to receive the filtered airflow from the first speaker assembly, the nozzle comprising an air outlet arranged to emit the received filtered airflow from the head wearable air purifier, and a control circuit arranged to control a rotational speed of the motor-driven impeller of the first speaker assembly such that the maximum rotational speed of the motor-driven impeller is from 9000 to 18,000 RPM.

Abstract: A method for fabricating a component of an abatement apparatus is disclosed. The method comprises: meshing a 3D model representation of a component defining a reaction chamber of an abatement apparatus based on specified component characteristics to define an optimised finite element representation of the component; and fabricating the optimised finite element representation. In this way, a 3D model of a component of an abatement apparatus can be generated from which its performance can be modelled. Particular characteristics of the component may be defined which affect the operation of the abatement apparatus. Those characteristics may then be used to generate the optimized finite element representation of the component which has those characteristics using meshing (it will be appreciated that meshing is the operation of representing a geometric object as a set of finite elements).

Abstract: An impact detection system is disclosed for detecting and identifying an object colliding with a vehicle. The impact detection system comprises a sensor arrangement arranged to measure a characteristic of an impact of the object against the vehicle, a trigger determiner associated with the sensor arrangement for determining whether the characteristic of the 5 impact is greater than a predefined threshold value, and an image capturing device arranged to capture an image of the object. The system is arranged to automatically make the captured image available for inspection in response to the trigger determiner determining that the characteristic of the impact is greater than the predefined threshold value so that the object in the image can be identified substantially in real-time.

Abstract: A well abandonment tool comprising an elongate housing extending between top and bottom ends locatable within a wellbore having a longitudinal pumping cylindrical bore therein. The apparatus further comprises a wellbore seal located around the housing operable to engage upon the wellbore and to be expanded into contact therewith upon an upward motion of the housing so as to seal an annulus between the housing and the wellbore and a bridge plug engagement connector adapted to secure a bridge plug thereto at a position below the bottom end of the housing. The apparatus further includes a pumping piston longitudinally moveably located within the pumping cylinder, the pumping piston being suspended from a wireline wherein longitudinal movement of the pumping piston discharges a fluid into a bridge plug activation chamber having a movable cylinder adapted to draw the bridge plug engagement connector against the bottom end of the housing so as to expand the bridge plug into engagement with the wellbore.

Abstract: According to one implementation of the present disclosure, a memory array to block read-access of uninitialized memory locations is disclosed. The memory array includes: a plurality of memory cells apportioned into a plurality of memory columns and a plurality of memory rows, where each of the memory cells is configured to store a single bit of memory data; and one or more initialization columns corresponding to at least one of the plurality of memory columns. The initialization state of a memory row of the memory cells may be configured to be stored in: the memory row; a latch of word-line driver circuitry coupled to the memory array; or a memory cell of the one or more initialization columns of a corresponding row of the plurality of memory rows of the memory array.

Abstract: A method of operating a computer aided design (CAD) system model for modelling an article to be manufactured includes receiving a representation of the article, receiving constraints for the article, determining a maximum permissible curvature of one or more parts of the article, measuring the maximum curvature of the one or more parts of the article in the received representation and comparing the measured maximum curvature with the maximum permissible curvature. If the measured maximum curvature of at least one of the one or more parts exceeds the determined maximum permissible curvature, an error indication is provided. If the measured maximum curvature of each of the one or more parts does not exceed the determined maximum permissible curvature, the received representation for the article is stored.

Abstract: A well abandonment tool comprising an elongate housing extending between top and bottom ends locatable within a wellbore having a longitudinal pumping cylindrical bore with a pumping piston therein. The apparatus further comprises a wellbore seal located around the housing operable to engage upon the wellbore and to be expanded into contact therewith upon an upward motion of the housing so as to seal an annulus between the housing and the wellbore and a bridge plug engagement connector adapted to secure a bridge plug thereto at a position below the bottom end of the housing. The pumping piston is suspended from a wireline wherein longitudinal movement of the pumping piston discharges a fluid into a bridge plug activation chamber having a movable cylinder adapted to draw the bridge plug engagement connector against the bottom end of the housing so as to expand the bridge plug into engagement with the wellbore.

Abstract: Briefly, embodiments of claimed subject matter relate to adjusting, such as extending, a clock signal to permit completion of a write operations to a first memory type and/or to permit completion of read operations from a second memory type, wherein the first memory type and the second memory type are dissimilar from each other. In certain embodiments, the first memory type may comprise a magnetic random-access memory (MRAM) cell array, and the second memory type may comprise a static random-access memory (SRAM) cell array.

Abstract: Various implementations described herein are directed to a device having a voltage regulator that uses a modulator to adjust an output voltage. The device may include a time-to-digital converter that measures a timing delay of a logic chain, compares the timing delay to a reference delay to determine a timing delay error, and provides the timing delay error to the modulator for adjusting the output voltage.

Abstract: Various implementations described herein are directed to a device having a voltage regulator that uses a modulator to adjust an output voltage. The device may include a time-to-digital converter that measures a timing delay of a logic chain, compares the timing delay to a reference delay to determine a timing delay error, and provides the timing delay error to the modulator for adjusting the output voltage.

Abstract: An apparatus and method for preparing a casing of a subterranean well and injecting a sealing mixture therein. The apparatus comprises an elongate body extending between top and bottom ends connectable to a wireline at the top and having a plurality of nozzles extending therethrough proximate to the bottom. A plurality of scrapers within the body each have a first retracted position and a second radially extended position engageable with the casing. A cavity is operable to contain the sealing mixture and a piston is movable therein so to eject the sealing mixture through the nozzles. The method comprises positioning the body in the well at a location to be sealed, extending the scrapers to engage with the casing, displacing the body so to scrape against the casing and retracting the scrapers. The piston is displaced so to eject the sealing mixture through the nozzles.

Abstract: A treatment apparatus for treating an effluent gas includes a combustion chamber; a burner; an inlet for receiving secondary combustion air; an exhaust gas outlet for outputting exhaust gases from the combustion chamber; and a heat exchanger. The heat exchanger is configured to exchange heat between a first fluid and a second fluid flowing through respective first and second fluid flow paths. The first fluid flow path is connected to the inlet and the second fluid flow path is connected to the outlet such that the exhaust gases received at the outlet flow into the second fluid flow path. The heat exchanger comprises a fluid flow communication path for providing a path for flow of a portion of the exhaust gases from the second fluid into the first fluid; and at least one inlet aperture for inputting the first fluid to the combustion chamber.

Abstract: Venturi Scrubbers are used to separate particulate from a large range of fluids. Many provide additional liquid and/or gas to drive the fluid and aid in the removal of particulate. The present invention provides a liquid ring pump through which the fluid to be treated is first passed and then exhausted, with additional work fluid to a Venturi scrubber such that the particulate can be separated from the exhaust fluid.

Abstract: Briefly, embodiments of claimed subject matter relate to adjusting, such as extending, a clock signal to permit completion of a write operations to a first memory type and/or to permit completion of read operations from a second memory type, wherein the first memory type and the second memory type are dissimilar from each other. In certain embodiments, the first memory type may comprise a magnetic random-access memory (MRAM) cell array, and the second memory type may comprise a static random-access memory (SRAM) cell array.

Abstract: The abatement apparatus includes a porous element at least partially defining a treatment chamber and through which treatment materials pass for introduction into the treatment chamber for treatment of an effluent gas stream; and an infra-red heating device operable to emit infra-red energy to heat the porous element which heats the treatment materials as they pass through the porous element into the treatment chamber. In this way, infra-red energy, rather than combustion, can be used to raise the temperature within the treatment chamber in order to treat the effluent gas stream. This allows the apparatus to be used in environments where no fuel gas exists or where the provision of fuel gas is considered undesirable. Also, heating the treatment materials as they pass through the porous sleeve, rather than simply using radiant heat to heat the treatment chamber enables significantly more energy to be imparted into the treatment materials.

Abstract: Liquid ring pumps are used to pump a variety of fluid types. Corrosive fluids are easily handled by the work fluid but can cause corrosion of pumping mechanisms. The present invention provides a magnetically driven liquid ring pump with corrosion resistant pumping mechanisms which achieves a longer time between service intervals.

Abstract: A ground aeration device comprising: an air supply connector for receiving pressurised air from a source; a supporting element for supporting a drill element for insertion into the ground and a pneumatic hammer for hammering the drill element into the ground; a first pneumatic means comprising a first actuating means for actuating the pneumatic hammer; and a second pneumatic means comprising a second actuating means for controlling supply of the pressurised air through the drill element.

Abstract: Dry pumps are used to pump a variety of gas mixtures from the semiconductor industry. The present invention provides a liquid ring pump located between the dry pump and an abatement device to remove soluble corrosive materials prior to the exhaust gases entry to the abatement device, the work fluid exhausted from the liquid ring pump being separated from the gas prior to entry to the abatement device.

Abstract: A well abandonment tool comprising an elongate housing extending between top and bottom ends locatable within a wellbore having a longitudinal pumping cylindrical bore therein. The apparatus further comprises a wellbore seal located around the housing operable to engage upon the wellbore and to be expanded into contact therewith upon an upward motion of the housing so as to seal an annulus between the housing and the wellbore and a bridge plug engagement connector adapted to secure a bridge plug thereto at a position below the bottom end of the housing. The apparatus further includes a pumping piston longitudinally moveably located within the pumping cylinder, the pumping piston being suspended from a wireline wherein longitudinal movement of the pumping piston discharges a fluid into a bridge plug activation chamber having a movable cylinder adapted to draw the bridge plug engagement connector against the bottom end of the housing so as to expand the bridge plug into engagement with the wellbore.