Abstract: A housing assembly for a fluid sensor assembly includes a housing having a first and second sensing volumes. A fluid port attached to the housing has a porous membrane covering first and second fluid apertures. The first sensing volume included a vertically-oriented waveguide and is fluidly coupled to an exterior of the housing through the first fluid aperture, where the first aperture port has an area smaller than an area of a cross section of the waveguide. The second sensing volume is coupled to the exterior of the housing through the second fluid aperture, the second fluid aperture having an area larger than a cross section of the second sensing volume. While the first sensing volume and the second sensing volume are both in fluid communication with an exterior of the housing, the fluid port and porous membrane internally isolate the first sensing volume from the second sensing volume.

Abstract: A chair support shell has an integral back portion, seat portion, and joining portion between the back portion and the seat portion. At least a major portion of the support shell comprises a compliant structure, the compliant structure having a plurality of cells interconnected by a plurality of resilient members. The compliant structure provides compliance in the seat portion, compliance in the back portion, and compliance in the joining portion. The compliant structure enables recline of the back portion relative to the seat portion.

Abstract: A heat exchanger cleaning system (HECS) includes an engine having an intake conduit and an exhaust port, and an EGR cooler having a cooler inlet in fluid communication with the engine exhaust port, a cooler outlet in fluid communication with the engine intake conduit, and an exhaust gas recirculation (EGR) valve disposed between the engine exhaust port and the EGR cooler. A first pressure sensor is disposed between the engine exhaust port and the EGR valve, and a second pressure sensor disposed in the engine intake conduit. A controller is in electrical communication with the EGR valve, the first pressure sensor, and the second pressure sensor. The controller is configured to implement a predetermined set of operating parameters for the engine and/or the EGR valve, wherein implementation of the predetermined set of operating parameters causes an increased flow velocity of exhaust gas through the EGR cooler.

Abstract: An aqueous fluid filter assembly with aeration mitigation includes a cap, a bowl engaging the cap and defining a filter volume, and a filter element disposed in the filter volume. The filter element is sealed against an interior of the cap and an interior of the bowl to provide an unfiltered volume and a filtered volume. An inlet is in fluid communication with the unfiltered volume and an outlet is in fluid communication with the filtered volume via a pickup section. The pickup section has a pick-up section inlet extending into the filtered volume and an air-metering orifice, wherein the air-metering orifice has a diameter less than 30% of the diameter of the pick-up section inlet and the pick-up section inlet is located below the air-metering orifice.

Abstract: An aqueous fluid filter assembly with aeration mitigation includes a cap, a bowl engaging the cap and defining a filter volume, and a filter element disposed in the filter volume. The filter element is sealed against an interior of the cap and an interior of the bowl to provide an unfiltered volume and a filtered volume. An inlet is in fluid communication with the unfiltered volume and an outlet is in fluid communication with the filtered volume via a pickup section. The pickup section has a pick-up section inlet extending into the filtered volume and an air-metering orifice, wherein the air-metering orifice has a diameter less than 30% of the diameter of the pick-up section inlet and the pick-up section inlet is located below the air-metering orifice.

Abstract: A filter assembly comprising a housing, a filter, a heater, hose fittings, a heat bridge, and insulators. The housing defines interior and exterior regions communicating through apertures. The filter separate the housing into a region upstream of the filter comprising an aperture, and a region downstream of the filter comprising an aperture. The heater extends into the interior region. The hose fittings are each coincident with an aperture and are formed of a material having a high thermal conductivity. The heat bridge is formed of a material having a high thermal conductivity and thermally connects the heater to the hose fittings. The insulators each are formed of a material having a low thermal conductivity, and each at least partially cover a hose fitting.

Abstract: A filter assembly comprising a housing, a filter, a heater, hose fittings, a heat bridge, and insulators. The housing defines interior and exterior regions communicating through apertures. The filter separate the housing into a region upstream of the filter comprising an aperture, and a region downstream of the filter comprising an aperture. The heater extends into the interior region. The hose fittings are each coincident with an aperture and are formed of a material having a high thermal conductivity. The heat bridge is formed of a material having a high thermal conductivity and thermally connects the heater to the hose fittings. The insulators each are formed of a material having a low thermal conductivity, and each at least partially cover a hose fitting.

Abstract: An aqueous fluid filter assembly with aeration mitigation includes a cap, a bowl engaging the cap and defining a filter volume, and a filter element disposed in the filter volume. The filter element is sealed against an interior of the cap and an interior of the bowl to provide an unfiltered volume and a filtered volume. An inlet is in fluid communication with the unfiltered volume and an outlet is in fluid communication with the filtered volume via a pickup section. The pickup section has a pick-up section inlet extending into the filtered volume and an air-metering orifice, wherein the air-metering orifice has a diameter less than 30% of the diameter of the pick-up section inlet and the pick-up section inlet is located below the air-metering orifice.

Abstract: A housing assembly for a fluid sensor assembly includes a housing having a first and second sensing volumes. A fluid port attached to the housing has a porous membrane covering first and second fluid apertures. The first sensing volume included a vertically-oriented waveguide and is fluidly coupled to an exterior of the housing through the first fluid aperture, where the first aperture port has an area smaller than an area of a cross section of the waveguide. The second sensing volume is coupled to the exterior of the housing through the second fluid aperture, the second fluid aperture having an area larger than a cross section of the second sensing volume. While the first sensing volume and the second sensing volume are both in fluid communication with an exterior of the housing, the fluid port and porous membrane internally isolate the first sensing volume from the second sensing volume.

Abstract: A filter assembly comprising a housing, a filter, a heater, hose fittings, a heat bridge, and insulators. The housing defines interior and exterior regions communicating through apertures. The filter separate the housing into a region upstream of the filter comprising an aperture, and a region downstream of the filter comprising an aperture. The heater extends into the interior region. The hose fittings are each coincident with an aperture and are formed of a material having a high thermal conductivity. The heat bridge is formed of a material having a high thermal conductivity and thermally connects the heater to the hose fittings. The insulators each are formed of a material having a low thermal conductivity, and each at least partially cover a hose fitting.

Abstract: A filter assembly comprising a housing, a filter, a heater, hose fittings, a heat bridge, and insulators. The housing defines interior and exterior regions communicating through apertures. The filter separate the housing into a region upstream of the filter comprising an aperture, and a region downstream of the filter comprising an aperture. The heater extends into the interior region. The hose fittings are each coincident with an aperture and are formed of a material having a high thermal conductivity. The heat bridge is formed of a material having a high thermal conductivity and thermally connects the heater to the hose fittings. The insulators each are formed of a material having a low thermal conductivity, and each at least partially cover a hose fitting.

Abstract: An open flow area test apparatus and test method for characterizing the performance of a sand control insert, such as slotted liner or wire-wrapped screen or other sand control apparatus. A sand control insert is set at or near the base of a pressure tight body, a sand pack is provided above the sand control insert, and a piston head applies a simulated overburden pressure to the sand pack. A test fluid is pumped through the sand control insert and differential pressures and sand flow through measured.

Abstract: A filter assembly comprising a housing, a filter, a heater, hose fittings, a heat bridge, and insulators. The housing defines interior and exterior regions communicating through apertures. The filter separate the housing into a region upstream of the filter comprising an aperture, and a region downstream of the filter comprising an aperture. The heater extends into the interior region. The hose fittings are each coincident with an aperture and are formed of a material having a high thermal conductivity. The heat bridge is formed of a material having a high thermal conductivity and thermally connects the heater to the hose fittings. The insulators each are formed of a material having a low thermal conductivity, and each at least partially cover a hose fitting.

Abstract: A valve comprising a housing, a flow guide comprising an operational axis, a poppet comprising a sealing surface, a bias weight and a reaction force component engaged with the poppet. In a first orientation, the poppet is open, and in a second orientation, the poppet is closed. The flow guide comprises a first side opposite a second side, and a through hole extending between the sides. The through hole adapted to provide fluid communication through the flow guide. In the open position, the sealing surface is offset from and permits flow through the flow guide. In the closed position, the sealing surface is engaged with and prevents flow through the flow guide. The bias weight may exert an opening bias force on the poppet that is a function of the orientation of the operational axis. The reaction force component may exert a closing bias force on the poppet.

Abstract: An open flow area test apparatus and test method for characterizing the performance of a sand control insert, such as slotted liner or wire-wrapped screen or other sand control apparatus. A sand control insert is set at or near the base of a pressure tight body, a sand pack is provided above the sand control insert, and a piston head applies a simulated overburden pressure to the sand pack. A test fluid is pumped through the sand control insert and differential pressures and sand flow through measured.

Abstract: Techniques for distributing messages to consumers on behalf of promoters. In some embodiments, once a message is provided to a message distribution system to be distributed to consumers on behalf of promoters, the message distribution system may determine the consumers to which to distribute the message based on the personal interest identifiers for the consumers that identify personal interests of the consumers. In particular, in some embodiments, a message distribution system may determine a topic for a message and personal interest identifiers for the message that correspond to personal interest identifiers input by consumers. Once the set of personal interest identifiers for the message has been identified, a set of consumers who have input one or more of those personal interest identifiers is identified. The message may then be made available to the identified set of consumers.

Abstract: Systems and methods for identifying a user of an electronic device are disclosed. An example method includes capturing a physical characteristic of a hand of a user via a sensor on a computing device. The characteristic is captured as the user touches the computing device for a purpose different from user identification. The example method includes determining an identifier associated with the user based on the captured characteristic.

Abstract: A sealing lid assembly used in connection with a service port, the sealing lid assembly including a cap; a plug extending from an underside of the cap and at least partially receivable in the service port, a first seal supported on the plug and extending radially outward therefrom to sealingly engage the service port when the cap is in a closed position; and a biasing assembly adapted to urge the cap toward the closed position.

Abstract: Techniques for distributing messages to consumers on behalf of promoters. In some embodiments, once a message is provided to a message distribution system to be distributed to consumers on behalf of promoters, the message distribution system may determine the consumers to which to distribute the message based on the personal interest identifiers for the consumers that identify personal interests of the consumers. In particular, in some embodiments, a message distribution system may determine a topic for a message and personal interest identifiers for the message that correspond to personal interest identifiers input by consumers. Once the set of personal interest identifiers for the message has been identified, a set of consumers who have input one or more of those personal interest identifiers is identified. The message may then be made available to the identified set of consumers.

Abstract: Synchronous control for an output of a generator is disclosed. A desired output level at the output of the generator is received. An off time to achieve the desired output level is determined. A timing for the off time is determined. One or more coil outputs are caused to switch off for the off time at the determined timing for the off time. The one or more coil outputs contribute to the output of the generator in the event that the one or more coil outputs are switched on.