Abstract: The description relates to hinged devices, such as hinged computing devices. One example can include a first portion associated with a first axial timing surface and a second portion associated with a second axial timing surface. The example can also include a clutch stack spanning between the first portion and the second portion and a timing shuttle configured to engage the first and second axial timing surfaces to synchronize rotation of the first and second portions through a range of rotation. The example can include orientation dependent cams that control compression of the clutch stack as the first and second portions rotate through the range of rotation.

Abstract: The description relates to hinged devices, such as hinged computing devices. One example can include a first portion including a display and a second portion including an input device. This example can also include a hinge assembly rotationally securing the first and second portions through a range of angular orientations and a sensor positioned relative to the hinge assembly and configured to sense relative linear positions of the hinge assembly that correspond to angular orientations of the first and second portions.

Abstract: The description relates to hinged devices, such as hinged computing devices. One example can include a first portion secured to a first hinge arm that is configured to rotate around a first hinge axis and a second portion secured to a second hinge arm that is configured to rotate around a second hinge axis. A timing shuttle can be positioned on a central shaft that is located between the first hinge axis and the second hinge axis and is configured to control a frictional torque experienced by the first and second hinge arms depending upon orientation of the first and second hinge arms and to synchronize rotation of the first and second hinge arms around the first and second hinge axes.

Abstract: The description relates to hinged devices, such as hinged computing devices. One example can include a first portion having a first display and a second portion having a second display and a hinge assembly rotatably securing the first and second portions. The hinge assembly can define rotation of the first portion by a first pair of hinge guide pins riding in a first guide track and rotation of the second portion by a second pair of hinge guide pins riding in a second guide track.

Abstract: Provided herein are methods and compositions utilizing one or more cementitious replacement materials, one or more alkaline activating materials, and, optionally one or more bonding materials and/or one or more setting time enhancer materials.

Abstract: Provided herein are methods and compositions utilizing one or more cementitious replacement materials, one or more alkaline activating materials, and, optionally one or more bonding materials and/or one or more setting time enhancer materials. The one or more cement precursors comprises one or more of calcareous sludge; paper pulp, biomass flyash; bag house dust; biomass sludge; filter cakes from bio industry's and wastewater treatment; bio ash; biomedical ash; agricultural ash; sugar cane bagasse; rice husk ash; palm oil fuel ash; oxygen furnace slags; plant stalks; bio char; starch; pyrophyllite; or a combination thereof. The one or more alkaline activating agents comprises potassium silicate, potassium hydroxide, sodium hydroxide, sodium silicate, calcium hydroxide, magnesium hydroxide, reactive magnesium oxide, calcium chloride, sodium carbonate, silicone dioxide, sodium aluminate, calcium sulfate, sodium sulfate, or dolomite, or a combination thereof. The system comprises a vertical impact mixer.

Abstract: Provided herein are methods and compositions utilizing one or more cementitious replacement materials, one or more alkaline activating materials, and, optionally one or more bonding materials and/or one or more setting time enhancer materials.

Abstract: The description relates to hinged devices, such as hinged computing devices. One example can include a first portion having a first display and a second portion having a second display and a hinge assembly rotatably securing the first and second portions. The hinge assembly can define rotation of the first portion by a first pair of hinge guide pins riding in a first guide track and rotation of the second portion by a second pair of hinge guide pins riding in a second guide track.

Abstract: A modular sensor and display module comprises an enclosure with a rigid frame and front and back visor lens encapsulating sensors, waveguide optics, and display/projection devices that provide various functions for a typical head-mounted device. A front visor may conceal sensors and other components and may further provide dimming for holographic displays. The modular sensor and display module may include a standard interface for attachment to various fit systems, including, for example, headband, VR headset, glasses temples, helmet, and the like. A further module, such as a rear-attachment module, may be provided that can provide auxiliary compute, storage, and power resources for the modular sensor and display module.

Abstract: A modular sensor and display module comprises an enclosure with a rigid frame and front and back visor lens encapsulating sensors, waveguide optics, and display/projection devices that provide various functions for a typical head-mounted device. A front visor may conceal sensors and other components and may further provide dimming for holographic displays. The modular sensor and display module may include a standard interface for attachment to various fit systems, including, for example, headband, VR headset, glasses temples, helmet, and the like. A further module, such as a rear-attachment module, may be provided that can provide auxiliary compute, storage, and power resources for the modular sensor and display module.

Abstract: The description relates to devices, such as computing devices that have hinged portions. One example can include a first portion and a second portion. This example can also include a multi-pivot hinge unit rotatably securing the first and second portions. This example can further include a set of rigid hinge cover portions that are configured to be able to rotate relative to one another while collectively covering the multi-pivot hinge unit.