Abstract: A fuel-fired heater can include a fuel tank; a housing assembly supported by the fuel tank, the housing assembly defining a chamber having an inlet and an air outlet; a fan located within the housing assembly; an air pump located within the housing assembly; an electric motor coupled to at least one of the fan and the air pump; a burner assembly located within the housing assembly, the burner assembly including a burner nozzle in fluid communication with the air pump and the fuel tank via a fuel line, and including an ignitor; and an electronic controller operating the electric motor and ignitor, the electronic controller including a proximity sensor oriented and arranged to sense an object located in front of the air outlet, wherein the electronic controller deactivates the electric motor when an object is sensed by the proximity sensor within a predetermined distance for a predetermined time period.

Abstract: A rotary vane pump including a housing, and a motor. The motor includes a shaft which is coupled to a rotor. The rotor defines a plurality of slots. A plurality of free moving vanes are disposed within the slots. In one example, the rotor is formed from a first material and the plurality of vanes are formed from the first material and impregnated with a second material. The first material can be a carbon material. The second material can be a resin material, an antimony material, a copper material, or a silver material.

Abstract: A rotary vane pump including a housing, and a motor. The motor includes a shaft which is coupled to a rotor. The rotor defines a plurality of slots. A plurality of free moving vanes are disposed within the slots. In one example, the rotor is formed from a first material and the plurality of vanes are formed from the first material and impregnated with a second material. The first material can be a carbon material. The second material can be a resin material, an antimony material, a copper material, or a silver material.

Abstract: A method and system for tracking visitors' access to web content using a searchable and size-constrained local log repository is disclosed. A repository indexer receives visitor logs from a remote source and indexes the logs to include a usage field indicating when or how frequently an associated visitor log was accessed from a local log repository by a report request manager. The local log repository stores the logs and is size constrained. A repository manager removes a subset of the logs in the local log repository based on parameters within the subset of the logs' usage field. The report request manager receives a request from a requestor for a report indicating visitors' access to a content object, searches for logs within the local log repository pertinent to the request, aggregates data across the logs responsive to the search, and generates a report presenting the aggregated data.

Abstract: A method and system for tracking visitors' access to web content using a searchable and size-constrained local log repository is disclosed. A repository indexer receives visitor logs from a remote source and indexes the logs to include a usage field indicating when or how frequently an associated visitor log was accessed from a local log repository by a report request manager. The local log repository stores the logs and is size constrained. A repository manager removes a subset of the logs in the local log repository based on parameters within the subset of the logs' usage field. The report request manager receives a request from a requestor for a report indicating visitors' access to a content object, searches for logs within the local log repository pertinent to the request, aggregates data across the logs responsive to the search, and generates a report presenting the aggregated data.

Abstract: A method and system for tracking visitors' access to web content using a searchable and size-constrained local log repository is disclosed. A repository indexer receives visitor logs from a remote source and indexes the logs to include a usage field indicating when or how frequently an associated visitor log was accessed from a local log repository by a report request manager. The local log repository stores the logs and is size constrained. A repository manager removes a subset of the logs in the local log repository based on parameters within the subset of the logs' usage field. The report request manager receives a request from a requestor for a report indicating visitors' access to a content object, searches for logs within the local log repository pertinent to the request, aggregates data across the logs responsive to the search, and generates a report presenting the aggregated data.

Abstract: An electronic device having a concealed keyboard includes a first housing, a second housing rotatably coupled to the first housing, and a concealment cover coupled to a rear of the first housing. The first housing has a coupling edge and two sides that are substantially perpendicular to the coupling edge of the first housing. The second housing has a coupling edge and two sides that are substantially perpendicular to the coupling edge of the second housing. A receiving portion is formed on a rear surface of the first housing and is configured to receive the second housing. When the second housing is in the receiving portion, each respective side of the first housing and the second housing are co-terminal with one another. The concealment cover is exteriorly positioned with respect to the second housing when the second housing is in the receiving portion.

Abstract: A continuous self-cleaning centrifuge assembly having a feed inlet for unclarified liquid and first and second outlets for clarified liquid. Solids are discharged out of a solids holding space in the centrifuge in response to comparison of a measured turbidity to a predetermined turbidity parameter of clarified liquid bled in a detection line in communication with the centrifuge at the second outlet. The turbidity is affected by the degree of build up of solids in the centrifuge. A method of optimizing the clarified liquid outflowing from the centrifuge includes the steps of controlling the flow rate of unclarified liquid into the centrifuge in response to the turbidity of the clarified liquid flowing out of the centrifuge and discharging solids out of a solids holding space in the centrifuge in response to the turbidity measurement.

Abstract: An electronic device having a concealed keyboard includes a first housing, a second housing rotatably coupled to the first housing, and a concealment cover coupled to a rear of the first housing. The first housing has a coupling edge and two sides that are substantially perpendicular to the coupling edge of the first housing. The second housing has a coupling edge and two sides that are substantially perpendicular to the coupling edge of the second housing. A receiving portion is formed on a rear surface of the first housing and is configured to receive the second housing. When the second housing is in the receiving portion, each respective side of the first housing and the second housing are co-terminal with one another. The concealment cover is exteriorly positioned with respect to the second housing when the second housing is in the receiving portion.

Abstract: A continuous self-cleaning centrifuge assembly has a feed inlet (23) to the centrifuge (10) for unclarified liquid, an outlet (29) for clarified liquid, and means (42,39,38) to discharge solids out of a solids holding space (26) in the centrifuge in response to a monitored turbidity parameter of liquid in a detection line (35) in communication with the centrifuge separately from said outlet (29) so that said turbidity is affected by the degree of build up of solids in the centrifuge. In another aspect, a continuous self-cleaning centrifuge assembly has a feed inlet (123) to the centrifuge (110) for unclarified liquid, an outlet (129) for clarified liquid, and means (143,139,138) to discharge solids out of a solids holding space (126) in the centrifuge in response to a monitored turbidity parameter of liquid in an outflow line (128) connected to said outlet (129), wherein said turbidity parameter is the rate of rate of turbidity increase, or second derivative, of the monitored turbidity.