Abstract: Embodiments relate generally to systems and methods for determining end of service life for a respirator cartridge by comparing the gas levels sensed at two or more sample points within the cartridge. Sample streams may run from the sample points to a gas sensor, wherein a valve may control the flow between the sample streams and the gas sensor.

Abstract: Embodiments that relate to selectively filtering geo-located data items in a mixed reality environment are disclosed. For example, in one disclosed embodiment a mixed reality filtering program receives a plurality of geo-located data items and selectively filtering the data items based on one or more modes. The modes comprise one or more of a social mode, a popular mode, a recent mode, a work mode, a play mode, and a user interest mode. Such filtering yields a filtered collection of the geo-located data items. The filtered collection of data items is then provided to a mixed reality display program for display by a display device.

Abstract: Embodiments that relate to presenting a textured shared world model of a physical environment are disclosed. One embodiment includes receiving geo-located crowd-sourced structural data items of the physical environment. The structural data items are stitched together to generate a 3D spatial shared world model. Geo-located crowd-sourced texture data items are also received and include time-stamped images or video. User input of a temporal filter parameter is used to temporally filter the texture data items. The temporally-filtered texture data items are applied to surfaces of the 3D spatial shared world model to generate a textured shared world model of the physical environment. The textured shared world model is then provided for display by a display device.

Abstract: A mixed reality accommodation system and related methods are provided. In one example, a head-mounted display device includes a plurality of sensors and a display system for presenting holographic objects. A mixed reality safety program is configured to receive a holographic object and associated content provider ID from a source. The program assigns a trust level to the object based on the content provider ID. If the trust level is less than a threshold, the object is displayed according to a first set of safety rules that provide a protective level of display restrictions. If the trust level is greater than or equal to the threshold, the object is displayed according to a second set of safety rules that provide a permissive level of display restrictions that are less than the protective level of display restrictions.

Abstract: Embodiments that relate to presenting a mixed reality environment via a mixed reality display device are disclosed. For example, one disclosed embodiment provides a method for presenting a mixed reality environment via a head-mounted display device. The method includes using head pose data to generally identify one or more gross selectable targets within a sub-region of a spatial region occupied by the mixed reality environment. The method further includes specifically identifying a fine selectable target from among the gross selectable targets based on eye-tracking data. Gesture data is then used to identify a gesture, and an operation associated with the identified gesture is performed on the fine selectable target.

Abstract: The present disclosure includes sensing device embodiments. One sensing device includes a heater layer, a resistance detector layer, constructed and arranged to indicate a temperature value based upon a correlation to a detected resistance value, an electrode layer, and a sensing layer.

Abstract: A holographic object presentation system and related methods for presenting a holographic object having a selective information detail level are provided. In one example, a holographic object presentation program may receive user behavior information and physical environment information. Using one or more of the user behavior information and the physical environment information, the program may adjust the selective information detail level of the holographic object to an adjusted information detail level. The program may then provide the holographic object at the adjusted information detail level to an augmented reality display program for display on a display device.

Abstract: Systems and related methods for presenting a holographic object that self-adapts to a mixed reality environment are provided. In one example, a holographic object presentation program captures physical environment data from a destination physical environment and creates a model of the environment including physical objects having associated properties. The program identifies a holographic object for display on a display of a display device, the holographic object including one or more rules linking a detected environmental condition and/or properties of the physical objects with a display mode of the holographic object. The program applies the one or more rules to select the display mode for the holographic object based on the detected environmental condition and/or the properties of the physical objects.

Abstract: The present disclosure includes sensing device embodiments. One sensing device includes a heater layer, a resistance detector layer, constructed and arranged to indicate a temperature value based upon a correlation to a detected resistance value, an electrode layer, and a sensing layer.

Abstract: The present disclosure relates to methods and apparatus for detecting when respiratory cartridges of a respirator have reached their end-of-service-life. In some instances, two or more respiratory cartridges are removably connectable to a respirator housing, where each of the two or more respiratory cartridges receives ambient air and deliver cleaned air to the respirator housing. One of the respiratory cartridges may be configured to have a lower adsorption capacity than the remaining respirator cartridges. A gas sensor may be situated downstream of the reduced capacity respirator cartridge, and may detect an increased concentration of the targeted gas in the cleaned air delivered by the reduced capacity respiratory cartridge. When detected, an end-of-service-life indication may be provided to the user.

Abstract: A see-through, near-eye, mixed reality display apparatus providing a mixed reality environment wherein one or more virtual objects and one or more real objects exist within the view of the device. Each of the real and virtual have a commonly defined set of attributes understood by the mixed reality system allowing the system to manage relationships and interaction between virtual objects and other virtual objects, and virtual and real objects.

Abstract: A see-through, near-eye, mixed reality display apparatus providing a mixed reality environment wherein one or more virtual objects and one or more real objects exist within the view of the device. Each of the real and virtual have a commonly defined set of attributes understood by the mixed reality system allowing the system to manage relationships and interaction between virtual objects and other virtual objects, and virtual and real objects.

Abstract: A display apparatus and method for creating and displaying configured virtual environments based on real world source environments. A mixed reality environment includes real and virtual objects, and a set of one or more virtual objects may be associated with a source environment and stored as a configured environment for later rendering by the display apparatus. Configured environments may be associated with users, environments or locations.

Abstract: A method for presenting real and virtual images correctly positioned with respect to each other. The method includes, in a first field of view, receiving a first real image of an object and displaying a first virtual image. The method also includes, in a second field of view oriented independently relative to the first field of view, receiving a second real image of the object and displaying a second virtual image, the first and second virtual images positioned coincidently within a coordinate system.

Abstract: A respirator service lift indication system comprises a breathing apparatus comprising an air purifying element; and a service life indicator arranged in a parallel flow configuration with the breathing apparatus. The service life indicator comprises a sacrificial cartridge, and a sensor disposed downstream of the sacrificial cartridge and configured to detect a contaminant concentration above a predetermined threshold in an gas stream passing through the sacrificial cartridge.

Abstract: A device includes a cartridge containing a filter material. An insert extends through at least a portion of the filter material. The insert has gas sample path with an opening to provide a sample of air that is representative of the saturation of the filter material. A return path may be included in the insert to return sampled gas to the filter material. A gas mask contains a gas sensor and coupled to the cartridge, which may be replaced when saturated.

Abstract: A photoacoustic gas sensor includes a photoacoustic cell configured to receive a gas mixture having a first gas component and a second gas component. The photoacoustic gas sensor also includes a light source configured to provide light to the photoacoustic cell. The photoacoustic gas sensor further includes a photoacoustic cell controller configured to measure a concentration of the second gas component using a speed of sound through the gas mixture, where the speed of sound is determined based on an absorption associated with the first gas component. In addition, the photoacoustic gas sensor could include a temperature sensor configured to measure a temperature of the gas mixture, where the photoacoustic cell controller is configured to determine the concentration of the second gas component using the speed of sound and the temperature.

Abstract: A heat exchanger comprising an outer conduit and an inner conduit, arranged inside of and along the longitudinal axis of the outer conduit, the inner conduit and the outer conduit being arranged to form a fluid flow channel between the inner surface of the outer conduit and the outer surface of the inner conduit, the fluid flow channel having a cross sectional form, in a plane substantially perpendicular to the longitudinal axis of the outer conduit, that is elongate being substantially greater in the circumferential direction of the outer conduit than in the radial direction of the outer conduit.

Abstract: The present disclosure relates to methods and apparatus for detecting when respiratory cartridges of a respirator have reached their end-of-service-life. In some instances, two or more respiratory cartridges are removably connectable to a respirator housing, where each of the two or more respiratory cartridges receives ambient air and deliver cleaned air to the respirator housing. One of the respiratory cartridges may be configured to have a lower adsorption capacity than the remaining respirator cartridges. A gas sensor may be situated downstream of the reduced capacity respirator cartridge, and may detect an increased concentration of the targeted gas in the cleaned air delivered by the reduced capacity respiratory cartridge. When detected, an end-of-service-life indication may be provided to the user.

Abstract: A system and method combining real-world actions and virtual actions in a gaming environment. In one aspect, a massively multiplayer environment combines the real world actions and virtual actions of a participant to influence both character metrics and game play within one or more games provided by the service. In the real world or location-based events, game play occurs in and around links explicitly created between real world locations and virtual representations of those locations within the game.