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: In one example, a portion of a shed includes a blow molded plastic door, a blow molded plastic wall panel, and a double jointed hinge configured to connect the blow molded plastic door and the blow molded plastic wall panel to each other. The double jointed hinge includes a first hinge element that connectible to the blow molded plastic wall panel, a second hinge element that is connectible to the blow molded plastic door, and a first link and a second link, the first link and the second link configured to connect the first hinge element to the second hinge element, and when the shed portion is in an assembled state, and the blow molded plastic door is fully closed, the first link and the second link are received within a recess cooperatively defined by the blow molded plastic wall panel and the blow molded plastic door.

Abstract: In one example, a double jointed hinge connects a blow molded plastic door and a blow molded plastic wall panel. The double jointed hinge includes a first hinge element that defines a first axis of rotation, and the first hinge element is connected to the blow molded plastic wall panel, a second hinge element that defines a second axis of rotation and is connected to the blow molded plastic door, and the second hinge element is spaced apart from the first hinge element, and a first link and a second link, the first link and the second link connecting the first hinge element to the second hinge element.

Abstract: In one example, an apparatus includes a blow molded structure with one or more parting lines. The blow molded structure includes a body portion that is an integral part of the blow molded structure, and a pin that is integral with the body portion, and a portion of the pin is spaced apart from the body portion of the blow molded structure so that a space is defined between the portion of the pin and the body portion.

Abstract: In one example, a double jointed hinge connects a blow molded plastic door and a blow molded plastic wall panel. The double jointed hinge includes a first hinge element that defines a first axis of rotation, and the first hinge element is connected to the blow molded plastic wall panel, a second hinge element that defines a second axis of rotation and is connected to the blow molded plastic door, and the second hinge element is spaced apart from the first hinge element, and a first link and a second link, the first link and the second link connecting the first hinge element to the second hinge element.

Abstract: In an electronic system, a frequency modulator manages clock signals for electromagnetic interference (EMI) reduction. The illustrative frequency modulator comprises a core oscillator, and a clock divider coupled to the core oscillator that modulates frequency of the core oscillator and deterministically spreads clock spectral components of a digital clock signal whereby electromagnetic interference (EMI) is reduced. The frequency modulator further comprises a circuit coupled to the clock divider that receives the digital clock signal, combines the digital clock signal with a data bitstream for transmission across an isolation barrier, and resynchronizes to the digital clock signal.

Abstract: In an electronic system, a frequency modulator manages clock signals for electromagnetic interference (EMI) reduction. The illustrative frequency modulator comprises a core oscillator, and a clock divider coupled to the core oscillator that modulates frequency of the core oscillator and deterministically spreads clock spectral components of a digital clock signal whereby electromagnetic interference (EMI) is reduced. The frequency modulator further comprises a circuit coupled to the clock divider that receives the digital clock signal, combines the digital clock signal with a data bitstream for transmission across an isolation barrier, and resynchronizes to the digital clock signal.