Abstract: A cross reality system enables any of multiple types of devices to efficiently and accurately access previously stored maps and render virtual content specified in relation to those maps. The cross reality system may include a cloud-based localization service that responds to requests from devices to localize with respect to a stored map. Devices of any type, with native hardware and software configured for augmented reality operations may be configured to work with the cross reality system by incorporating components that interface between the native AR framework of the device and the cloud-based localization service. These components may present position information about the device in a format recognized by the localization service. Additionally, these components may filter or otherwise process perception data provided by the native AR framework to increase the accuracy of localization.

Abstract: A cross reality system that provides an immersive user experience by storing persistent spatial information about the physical world that one or multiple user devices can access to determine position within the physical world and that applications can access to specify the position of virtual objects within the physical world. Persistent spatial information enables users to have a shared virtual, as well as physical, experience when interacting with the cross reality system. Further, persistent spatial information may be used in maps of the physical world, enabling one or multiple devices to access and localize into previously stored maps, reducing the need to map a physical space before using the cross reality system in it. Persistent spatial information may be stored as persistent coordinate frames, which may include a transformation relative to a reference orientation and information derived from images in a location corresponding to the persistent coordinate frame.

Abstract: A ladar transmitter that transmits ladar pulses toward a plurality of range points in a field of view can be controlled to target range points based on any of a plurality of defined shot patterns. Each defined shot pattern can be instantiated to identify various coordinates in the field of view that are to be targeted by a ladar pulses. A processor can process data about the field of view such as range data and/or camera data to make selections as to which of the defined shot patterns should be selected over time.

Abstract: A cross reality system enables any of multiple types of devices to efficiently and accurately access previously stored maps and render virtual content specified in relation to those maps. The cross reality system may include a cloud-based localization service that responds to requests from devices to localize with respect to a stored map. Devices of any type, with native hardware and software configured for augmented reality operations may be configured to work with the cross reality system by incorporating components that interface between the native AR framework of the device and the cloud-based localization service. These components may present position information about the device in a format recognized by the localization service. Additionally, these components may filter or otherwise process perception data provided by the native AR framework to increase the accuracy of localization.

Abstract: Techniques performed by a data processing system for caching data herein include initializing a single instance of a persisted cache service on the data processing system, receiving data requests from a plurality of single page applications (SPAs) on the data processing system, processing the data requests using the persisted cache service to obtain requested data from a cache implemented on the data processing system or from one or more remote data sources via a network connection, and providing the requested data obtained from the cache or the one or more remote data sources to an SPA of the plurality of SPAs from which each data request originated.

Abstract: A pump set for use with a pumping apparatus to deliver nutrition to an infant includes a first container to receive breast milk; a second container to receive fortifier; tubing extending from the first container and from the second container; and a valve mechanism connected to the first and second containers by the tubing and configured to selectively pass liquid from the first container and the second container.

Abstract: A cross reality system that provides an immersive user experience by storing persistent spatial information about the physical world that one or multiple user devices can access to determine position within the physical world and that applications can access to specify the position of virtual objects within the physical world. Persistent spatial information enables users to have a shared virtual, as well as physical, experience when interacting with the cross reality system. Further, persistent spatial information may be used in maps of the physical world, enabling one or multiple devices to access and localize into previously stored maps, reducing the need to map a physical space before using the cross reality system in it. Persistent spatial information may be stored as persistent coordinate frames, which may include a transformation relative to a reference orientation and information derived from images in a location corresponding to the persistent coordinate frame.

Abstract: Disclosed herein is a system configured to implement a service worker capable of serving multiple single page applications (SPAs) that are hosted in the same uniform resource locator (URL) space (e.g., a domain within which the SPAs are hosted). Accordingly, the defined scope of the service worker is no longer bound by only one SPA, but rather by a root directory of a web site that hosts multiple SPAs. Since the service worker described herein serves multiple SPAs, the service worker implements an approach to ensure that a correct application controller corresponding to the SPA that hosts a URL is invoked. To do this, the service worker is configured to leverage a router and a routing table to associate a URL included in a request from a browser with the correct application controller corresponding to the SPA that hosts the URL for which the request is sent.

Abstract: A pump set for use with a pumping apparatus to deliver nutrition to an infant includes a first container to receive breast milk; a second container to receive fortifier; tubing extending from the first container and from the second container; and a valve mechanism connected to the first and second containers by the tubing and configured to selectively pass liquid from the first container and the second container.

Abstract: Gas and liquid velocities of fluid in a lift gas assisted well system are estimated by adding liquid and gas tracers downhole and monitoring their travel time over a known distance. Based on estimated velocities, a slip factor is obtained that represents relative velocities of the gas and liquid in the fluid. A flow regime of the fluid is identified based on the slip factor. The flow regime is optionally altered by adjusting one or more operational parameters of the well.

Abstract: Systems and methods which utilize one or more social networking systems when creating, funding, and/or notifying a party of a transaction are provided. In accordance with one aspect, a money transfer transaction may be staged by a user whereupon a link corresponding to the staged transaction may be posted to one or more social networking services in order to allow for multiple users to access and fund the staged transaction. Additionally, in some aspects a user of a social networking service may generate a comment or post which then automatically triggers the staging of a money transfer transaction. Moreover, social networking services may be utilized to provide various notifications regarding money transfer transactions.

Abstract: A lift gas injection system that is used for introducing lift gas into a stream of production fluid includes a lift gas injection valve. A pressure protection system guards the injection valve against external overpressure by blocking communication to inside the injection valve housing when ambient pressure exceeds a set pressure. Communication is blocked by moving a valve member so that it obstructs flow through an opening in the housing. The system includes pressure actuated valve which has a platen mounted to an end of a bellows, and a valve member coupled to the platen. Surface area is reduced on the bellows side of the platen that creates a force imbalance on the platen from applied ambient pressure. At the set pressure the force imbalance moves the platen, and which pushes the valve member against the opening. A compressible pressure compensator inside the injection valve protects against internal overpressure.

Abstract: Liquid is unloaded from a well with a hybrid gas lift system that includes a lift gas source and valves for injecting lift gas into production tubing. The types of valves include pressure production operated (“PPO”) valves and a surface operated valve. Pressure inside the production tubing is measured to monitor operation of the PPO valves, and identify if the PPO valves are experiencing and anomaly, such as multi-pointing or chattering. The surface operated valve is selectively actuated to correct anomalous operation of the PPO valves.

Abstract: A method and system of producing fluid from a well with a gas lift system that includes a virtual plunger made from a plunger forming material. The virtual plunger is formed downhole by injecting the plunger forming material directly into a column of liquid inside production tubing and from an annulus that circumscribes the production tubing. The flow of plunger forming material into the production tubing is controlled by an injection valve intersecting a sidewall of the production tubing. The plunger forming material is added to the annulus from the surface, and enough is added so its upper level is above the injection valve. Adding injection gas to the production tubing below the virtual plunger pushes the virtual plunger and column of liquid to surface. The plunger forming material has properties so that the virtual plunger remains cohesive while traveling uphole.

Abstract: An augmented reality viewing system is described. A local coordinate frame of local content is transformed to a world coordinate frame. A further transformation is made to a head coordinate frame and a further transformation is made to a camera coordinate frame that includes all pupil positions of an eye. One or more users may interact in separate sessions with a viewing system. If a canonical map is available, the earlier map is downloaded onto a viewing device of a user. The viewing device then generates another map and localizes the subsequent map to the canonical map.

Abstract: A ladar transmitter that transmits ladar pulses toward a plurality of range points in a field of view can be controlled to target range points based on any of a plurality of defined shot list frames. Each defined shot list frame can identify various coordinates in the field of view that are to be targeted by a ladar pulses for a given ladar frame. A processor can process data about the field of view such as range data and/or camera data to make selections as to which of the defined shot list frames should be selected for a given frame of ladar data.

Abstract: A cross reality system enables any of multiple types of devices to efficiently and accurately access previously stored maps and render virtual content specified in relation to those maps. The cross reality system may include a cloud-based localization service that responds to requests from devices to localize with respect to a stored map. Devices of any type, with native hardware and software configured for augmented reality operations may be configured to work with the cross reality system by incorporating components that interface between the native AR framework of the device and the cloud-based localization service. These components may present position information about the device in a format recognized by the localization service. Additionally, these components may filter or otherwise process perception data provided by the native AR framework to increase the accuracy of localization.

Abstract: A cross reality system enables any of multiple devices to efficiently and accurately access previously stored maps and render virtual content specified in relation to those maps. Both stored maps and tracking maps used by portable devices may have wireless fingerprints associated with them. The portable devices may maintain wireless fingerprints based on wireless scans performed repetitively, based on one or more trigger conditions, as the devices move around the physical world. The wireless information obtained from these scans may be used to create or update wireless fingerprints associated with locations in a tracking map on the devices. One or more of these wireless fingerprints may be used when a previously stored map is to be selected based on its coverage of an area in which the portable device is operating. Maintaining wireless fingerprints in this way provides a reliable and low latency mechanism for performing map-related operations.

Abstract: A cross reality system enables any of multiple devices to efficiently and accurately access previously stored maps and render virtual content specified in relation to those maps. The cross reality system may include a cloud-based localization service that responds to requests from devices to localize with respect to a stored map. The request may include one or more sets of feature descriptors extracted from an image of the physical world around the device. Those features may be posed relative to a coordinate frame used by the local device. The localization service may identify one or more stored maps with a matching set of features. Based on a transformation required to align the features from the device with the matching set of features, the localization service may compute and return to the device a transformation to relate its local coordinate frame to a coordinate frame of the stored map.

Abstract: An augmented reality viewing system is described. A local coordinate frame of local content is transformed to a world coordinate frame. A further transformation is made to a head coordinate frame and a further transformation is made to a camera coordinate frame that includes all pupil positions of an eye. One or more users may interact in separate sessions with a viewing system. If a canonical map is available, the earlier map is downloaded onto a viewing device of a user. The viewing device then generates another map and localizes the subsequent map to the canonical map.