Abstract: Embodiments described herein generally relate to drilling fluids and more specifically relate to methods for treating drilling fluids. A method for treating a drilling fluid within a wellbore includes preparing a treatment fluid at an off-site location, where the treatment fluid contains at least a base fluid, an emulsifier, and a wetting agent. The method also includes transporting the treatment fluid from the off-site location to a drilling site containing the wellbore and adding the treatment fluid into the wellbore to combine with the drilling fluid and produce a treated drilling fluid.

Abstract: A method of operating a video game system can include applying an optical filter in a field of view of a camera to filter out visible light and allow the camera to view non-visible light directed at a display screen positioned within the field of view of the camera. The method can also include processing the video output feed from the camera with a computer processor to identify a location of a non-visible light dot within the field of view of the camera that is projected onto the display screen by a light targeting peripheral unit. The method can also include calculating the location of the non-visible light dot within the field of view of the camera as a proportion of one or more dimensions of the field of view of the camera and translating the location of the non-visible light dot within the field of view of the camera onto a location on the display screen.

Abstract: A video game system can include a console, a camera and a light targeting peripheral (LTP), where the LPT can direct non-visible light (e.g., infrared (IR) light) onto a display screen. The camera is positioned so that is can view the display screen, and can locate a non-visible light dot on the display screen during video game play. The system can be used with any size or type of electronic display (e.g., any type of television, computer screen, etc.), or any type of non-electronic display (e.g., projector screen) on which the video game can be projected.

Abstract: A method of calibration a video game system can include removing an optical filter that filters out visible light from a field of view of a camera to allow the camera to view visible light. The method can also include displaying a calibration image on a display screen located within the field of view of the camera, processing the video output feed from the camera with a computer processor to identify the calibration image, and calculating with the processor coordinates that represent corners of the display screen in the field of view of the camera once the calibration image is identified.

Abstract: A method of operating a video game system can include applying an optical filter in a field of view of a camera to filter out visible light and allow the camera to view non-visible light directed at a display screen positioned within the field of view of the camera. The method can also include processing the video output feed from the camera with a computer processor to identify a location of a non-visible light dot within the field of view of the camera that is projected onto the display screen by a light targeting peripheral unit. The method can also include calculating the location of the non-visible light dot within the field of view of the camera as a proportion of one or more dimensions of the field of view of the camera and translating the location of the non-visible light dot within the field of view of the camera onto a location on the display screen.

Abstract: A video game system can include a console, a camera and a light targeting peripheral (LTP), where the LPT can direct non-visible light (e.g., infrared (IR) light) onto a display screen. The camera is positioned so that is can view the display screen, and can locate a non-visible light dot on the display screen during video game play. The system can be used with any size or type of electronic display (e.g., any type of television, computer screen, etc.), or any type of non-electronic display (e.g., projector screen) on which the video game can be projected.

Abstract: A method of calibration a video game system can include removing an optical filter that filters out visible light from a field of view of a camera to allow the camera to view visible light. The method can also include displaying a calibration image on a display screen located within the field of view of the camera, processing the video output feed from the camera with a computer processor to identify the calibration image, and calculating with the processor coordinates that represent corners of the display screen in the field of view of the camera once the calibration image is identified.

Abstract: The present disclosure relates to an airflow management system, particularly for a lawn mower, especially a robotic lawn mower. A battery-operated robotic lawn mower has an active airflow management system that includes at least one first air vent positioned on an underside of the mower, at least one second air vent, an internal housing surrounding a motor, a fan, and at least one cooling air channel located within the housing and around said motor. An air flow path is defined between the first and the second vents, and the at least one second vent has a lower air flow capacity than an air flow capacity of the at least one cooling air channel such that, in operation, a greater volume of air is drawn through the first vent than the second.

Abstract: A cutter guard for a rotating blade of a lawn mower, particularly for a robotic, self-guided or autonomous lawn mower forms a cutting bowl in which the blade is mounted for rotation about a generally vertical axis. The guard comprises a generally planar guard section surrounded by an arcuate section, transverse edges of which define an opening in the cutter guard, which in operation is pointed to the front of the lawn mower, to allow uncut grass to be accessed by the cutting blades. The arcuate section comprises a plurality of apertures.

Abstract: A method of filtering noise in a three-dimensional position measurement system comprising receiving distance data representative of the respective distances between at least four spatially dispersed known points and an unknown point, performing triangulation calculations to determine at least two solutions to the three dimensional position of the unknown point relative to the known points, calculating a symmetrical bounding surface such as a sphere or cube which just encloses the said solutions, comparing the maximum dimension of the bounding surface with a first predetermined error threshold, and if the maximum dimension is less than the first error threshold, determining the center position of the bounding surface and outputting the center position as a noise-filtered position for the unknown point.

Abstract: According to various embodiments, the invention provides a method for establishing communication between a computer program in a computing system and a controller held in a hand of a user, comprising: capturing image data in a capture area in front of a display, the capturing configured to identify a two-dimensional location of the controller in the capture area; and capturing one-way sound communication between a location proximate to the display and a location at the controller, the sound communication being used to compute a third-dimensional location of the controller in the capture area.

Abstract: A cutter guard for a rotating blade of a lawn mower, particularly for a robotic, self-guided or autonomous lawn mower forms a cutting bowl in which the blade is mounted for rotation about a generally vertical axis. The guard comprises a generally planar guard section surrounded by an arcuate section, transverse edges of which define an opening in the cutter guard, which in operation is pointed to the front of the lawn mower, to allow uncut grass to be accessed by the cutting blades. The arcuate section comprises a plurality of apertures.

Abstract: The present invention relates to an airflow management system, particularly for a lawn mower, especially a robotic lawn mower. We describe a battery-operated robotic lawn mower with an active airflow management system, said active airflow management system comprising: at least one first air vent positioned on an underside of said mower; at least one second air vent; an internal housing surrounding a motor; a fan; and at least one cooling air channel located within said housing and around said motor. An air flow path is defined between the first and the second vents; and said at least one second vent has a lower air flow capacity than an air flow capacity of said at least one cooling air channel, such that in operation, a greater volume of air is drawn through the first vent than the second.

Abstract: A method of filtering noise in a three-dimensional position measurement system comprising receiving distance data representative of the respective distances between at least four spatially dispersed known points and an unknown point, performing triangulation calculations to determine at least two solutions to the three dimensional position of the unknown point relative to the known points, calculating a symmetrical bounding surface such as a sphere or cube which just encloses the said solutions, comparing the maximum dimension of the bounding surface with a first predetermined error threshold, and if the maximum dimension is less than the first error threshold, determining the centre position of the bounding surface and outputting the centre position as a noise-filtered position for the unknown point.

Abstract: A gyroscopic pointing apparatus for an electronic device, particularly a games console, that is provided with means to detect when the mobile component is pointing at the screen upon which it controls a cursor to provide a mechanism to correct for drift in gyroscope readings and an improved method of dynamically recalibrating the zero point of the gyroscopes. The pointing detection mechanism may be provided by the combination of an infra-red LED and an infra-red sensor in either permutation on the mobile component and fixed component respectively.

Abstract: According to various embodiments, the invention provides a method for establishing communication between a computer program in a computing system and a controller held in a hand of a user, comprising: capturing image data in a capture area in front of a display, the capturing configured to identify a two-dimensional location of the controller in the capture area; and capturing one-way sound communication between a location proximate to the display and a location at the controller, the sound communication being used to compute a third-dimensional location of the controller in the capture area.

Abstract: The system and methods of the present invention relate to integrating real or simulated data into a network planning tool.

Abstract: A process for porting air inflated flexible resin impregnated cured in place liner by pulling without loss of pressure is provided. A selectively openable bulkhead fitting is installed at the pull-in end. The filling may be installed in the end of a pull-in liner; on a porting sleeve or secured to an inflated pulled in or inverted liner. A port is formed through the bulkhead fitting by cutting a hole through the valve assembly. A steam fitting with an exhaust hose is coupled to the bulkhead fitting while maintaining pressure in the inflation bladder. Steam for curing the resin is then introduced into the inversion apparatus to cure the resin and is exhausted through the exhaust hose.

Abstract: A cover underlies the sole and heel of a shoe or boot to prevent debris from same contracting the floor surface. The cover sole is of a size to extend outwardly beyond the edge of a footwear sole and heel. Material having a back and a loop pile of synthetic polymeric material is formed to provide the sole and forwardly and rearwardly located straps. Fabric closure elements of the hook type in place on certain of the straps engage the loop pile on a companion strap to retain the cover on a piece of footwear.