Abstract: Various implementations provide views of 3D environments (e.g., extended reality (XR) environments). Non-eye-based user activity, such as hand gestures, is associated with some types of eye-based activity, such as the user gazing at a particular user interface component displayed within a view of a 3D environment. For example, a user's pinching hand gesture may be associated with the user gazing at a particular user interface component, such as a button, at around the same time as the pinching hand gesture is made. These associated behaviors (e.g., the pinch and gaze at the button) may then be interpreted as user input, e.g., user input selecting or otherwise acting upon that user interface component. In some implementations, non-eye-based user activity is only associated with types of eye-based user activity that are likely to correspond to a user perceiving what they are seeing and/or intentionally looking at something.

Abstract: Methods and apparatus for correcting the gaze direction and the origin (entrance pupil) in gaze tracking systems. During enrollment after an eye model is obtained, the pose of the eye when looking at a target prompt is determined. This information is used to estimate the true visual axis of the eye. The visual axis may then be used to correct the point of view (PoV) with respect to the display during use. If a clip-on lens is present, a corrected gaze axis may be calculated based on the known optical characteristics and pose of the clip-on lens. A clip-on corrected entrance pupil may then be estimated by firing two or more virtual rays through the clip-on lens to determine the intersection between the rays and the corrected gaze axis.

Abstract: This document describes imaging and visualization systems in which the intent of a group of users in a shared space is determined and acted upon. In one aspect, a method includes identifying, for a group of users in a shared virtual space, a respective objective for each of two or more of the users in the group of users. For each of the two or more users, a determination is made, based on inputs from multiple sensors having different input modalities, a respective intent of the user. At least a portion of the multiple sensors are sensors of a device of the user that enables the user to participate in the shared virtual space. A determination is made, based on the respective intent, whether the user is performing the respective objective for the user. Output data is generated and provided based on the respective objectives respective intents.

Abstract: Techniques are disclosed for operating a time-of-flight (TOF) sensor. The TOF may be operated in a low power mode by repeatedly performing a low power mode sequence, which may include performing a depth frame by emitting light pulses, detecting reflected light pulses, and computing a depth map based on the detected reflected light pulses. Performing the low power mode sequence may also include performing an amplitude frame at least one time by emitting a light pulse, detecting a reflected light pulse, and computing an amplitude map based on the detected reflected light pulse. In response to determining that an activation condition is satisfied, the TOF may be switched to operate in a high accuracy mode by repeatedly performing a high accuracy mode sequence, which may include performing the depth frame multiple times .

Abstract: Techniques are disclosed for allowing a user's hands to interact with virtual objects. An image of at least one hand may be received from an image capture devices. A plurality of keypoints associated with at least one hand may be detected. In response to determining that a hand is making or is transitioning into making a particular gesture, a subset of the plurality of keypoints may be selected. An interaction point may be registered to a particular location relative to the subset of the plurality of keypoints based on the particular gesture. A proximal point may be registered to a location along the user's body. A ray may be cast from the proximal point through the interaction point. A multi-DOF controller for interacting with the virtual object may be formed based on the ray.

Abstract: Examples of wearable systems and methods can use multiple inputs (e.g., gesture, head pose, eye gaze, voice, totem, and/or environmental factors (e.g., location)) to determine a command that should be executed and objects in the three-dimensional (3D) environment that should be operated on. The wearable system can detect when different inputs converge together, such as when a user seeks to select a virtual object using multiple inputs such as eye gaze, head pose, hand gesture, and totem input. Upon detecting an input convergence, the wearable system can perform a transmodal filtering scheme that leverages the converged inputs to assist in properly interpreting what command the user is providing or what object the user is targeting.

Abstract: Examples of wearable systems and methods can use multiple inputs (e.g., gesture, head pose, eye gaze, voice, totem, and/or environmental factors (e.g., location)) to determine a command that should be executed and objects in the three-dimensional (3D) environment that should be operated on. The wearable system can detect when different inputs converge together, such as when a user seeks to select a virtual object using multiple inputs such as eye gaze, head pose, hand gesture, and totem input. Upon detecting an input convergence, the wearable system can perform a transmodal filtering scheme that leverages the converged inputs to assist in properly interpreting what command the user is providing or what object the user is targeting.

Abstract: Examples of wearable systems and methods can use multiple inputs (e.g., gesture, head pose, eye gaze, voice, totem, and/or environmental factors (e.g., location)) to determine a command that should be executed and objects in the three-dimensional (3D) environment that should be operated on. The wearable system can detect when different inputs converge together, such as when a user seeks to select a virtual object using multiple inputs such as eye gaze, head pose, hand gesture, and totem input. Upon detecting an input convergence, the wearable system can perform a transmodal filtering scheme that leverages the converged inputs to assist in properly interpreting what command the user is providing or what object the user is targeting.

Abstract: A method or apparatus for connecting a telephone call between a vehicle driver and a customer, the method comprising receiving a driver request message from a device associated with the vehicle driver to place a telephone call between the vehicle driver and a customer; using the driver request message to match the vehicle driver with a job allocation record in at least one database and identifying from the record the identity of the customer; retrieving a telephone number relating to the device associated with the vehicle driver and retrieving a customer telephone number from the at least one database; and causing a telephony service to use the telephone numbers to place the telephone call between the vehicle driver and the customer.

Abstract: A System and Method of Calculating a Price for a Vehicle Journey A system and method for calculating a price for a vehicle journey are provided, the method performed at a vehicle management server. The vehicle management server receives a journey booking comprising journey information, the journey information specifying at least a start time, a start location and an end location. The journey information may also specify further information. A journey cost calculation module, which may be integral with or separate from the vehicle management server, calculates a base price for the journey based on the start and end points of the journey. The journey cost calculation module checks whether the start time of the journey booking is within a predetermined time period specified by a first modifier rule and if the start time of the journey booking is within the predetermined time period, applies a price adjustment to the calculated base price according to the first modifier rule.

Abstract: A method or apparatus for connecting a telephone call between a vehicle driver and a customer, the method comprising receiving a driver request message from a device associated with the vehicle driver to place a telephone call between the vehicle driver and a customer; using the driver request message to match the vehicle driver with a job allocation record in at least one database and identifying from the record the identity of the customer; retrieving a telephone number relating to the device associated with the vehicle driver and retrieving a customer telephone number from the at least one database; and causing a telephony service to use the telephone numbers to place the telephone call between the vehicle driver and the customer.

Abstract: A fuel nozzle assembly is provided. The assembly includes an outer nozzle body having a first end and a second end and at least one inner nozzle tube having a first end and a second end. One of the nozzle body or nozzle tube includes a fuel plenum and a fuel passage extending therefrom, while the other of the nozzle body or nozzle tube includes a fuel injection hole slidably aligned with the fuel passage to form a fuel flow path therebetween at an interface between the body and the tube. The nozzle body and the nozzle tube are fixed against relative movement at the first ends of the nozzle body and nozzle tube, enabling the fuel flow path to close at the interface due to thermal growth after a flame enters the nozzle tube.

Abstract: A method of testing corrosive lubricating media using a wear testing apparatus without a mechanical seal. The wear testing apparatus and methods are effective for testing volatile corrosive lubricating media under pressure and at high temperatures.

Abstract: A biodegradable lubricant that is at least 60% biodegradable and has a gelation index of about 12 or less can be formulated using a transesterified triglyceride base oil together with a synthetic ester. A combination of an ester viscosity index improver and an olefin copolymer viscosity index improver also can be added. Further, the composition can be blended with mineral oils to lower the polarity in order to employ standard dispersant/inhibitor packages. Further, by mixing high and low viscosities of mineral oil in the formulation, it is possible to prepare a full range of SAE grade engine oils for gasoline-fueled and diesel-fueled engines.

Abstract: Tortuous passageways are provided in a substrate component that is retained within a holding chamber. Fuels and fuel mixtures to be comparatively tested are introduced into the holding chamber and into the tortuous passageways of the substrate component. The substrate component is controllably maintained at an elevated temperature during a specified number of defined test cycles. The substrate component is then removed and its after-test weight compared with an initial weight before the test. The tortuous passageways of the substrate component provide increased surface area subject to deposit formation and extended residence time for fuel to remain in contact with the substrate surface, thereby greatly enhancing the measured difference between tested fuels and fuel mixtures.

Abstract: An apparatus is described which permits the lubricity of fuel compositions at or near temperatures and pressures experienced by compression ignition fuel injector components during operation in a running engine. The apparatus consists of means to apply a measured force between two surfaces and oscillate them at high frequency while wetted with a sample of the fuel composition heated to an operator selected temperature. Provision is made to permit operation at or near the flash point of the fuel compositions.

Abstract: Tortuous passageways are provided in a substrate component that is retained within a holding chamber. Fuels and fuel mixtures to be comparatively tested are introduced into the holding chamber and into the tortuous passageways of the substrate component. The substrate component is controllably maintained at an elevated temperature during a specified number of defined test cycles. The substrate component is then removed and its after-test weight compared with an initial weight before the test. The tortuous passageways of the substrate component provide increased surface area subject to deposit formation and extended residence time for fuel to remain in contact with the substrate surface, thereby greatly enhancing the measured difference between tested fuels and fuel mixtures.

Abstract: A method and apparatus for determining the propensity of fuel materials to leave deposits in compression ignition engines is disclosed. The apparatus consists of a closed chamber fitted with conduits to supply fuel composition, air, and other test fluids to its interior, and arranged to contain or substantially contain a substrate. Substrate is placed in the chamber to provide interaction between a fluid passing through and the substrate. Substrate may be a monolithic machined element or a collection of discrete bodies. The chamber conduits are connected to at least two metering devices, one controlling fuel and one air flow, whereby the substrate is exposed to measured quantities of fuel compositions and air. Heating devices are in thermal communication with the substrate and the source of air provided to the chamber, thus providing a method of controlling the temperature of the substrate and air flowing through the chamber.

Abstract: A one piece, durable, maintenance free, filament trimmer cutting head which is easily adaptable to virtually any power weedeater. The cylindrical design ensures ease of manufacture and results in a well balanced cutting head. The design further provides for ease of filament replacement and allows the usage of standard filament from bulk spools.