Abstract: Curved origami-based meta-material, manufacturing method of the same, curved origami-based haptic module and a method for producing active mechanical haptics. The curved origami-based metamaterial includes a panel having a single curved crease extending in its longitudinal direction, which divides the panel into two facets at its two opposite sides. The panel is configured to be folded along the single curved crease to form a folding angle between the two facets. The folding angle is configured to be adjustable to achieve a variable stiffness when loaded in a vertical direction of the folded panel, covering positive stiffness to negative stiffness.

Abstract: Methods, systems, and apparatus, including wetness monitoring systems comprising a smart diaper comprising: a sensorial battery comprising at least two electrodes; and a transmitter, wherein the sensorial battery is configured to provide electric current to the transmitter in the presence of water or urine, and wherein the transmitter is configured to emit a signal comprising a unique identifier when the electric current is received from the sensorial battery; and a computing device comprising: a receiver; a user interface; one or more processors; and a computer-readable storage device coupled to the one or more processors and having instructions stored thereon which, when executed by the one or more processors, cause the one or more processors to perform operations comprising: receiving, via the receiver, the signal emitted by the transmitter, and providing, via the user interface, an indication that the smart diaper is wet.

Abstract: Curved origami-based meta-material, manufacturing method of the same, curved origami-based haptic module and a method for producing active mechanical haptics. The curved origami-based metamaterial includes a panel having a single curved crease extending in its longitudinal direction, which divides the panel into two facets at its two opposite sides. The panel is configured to be folded along the single curved crease to form a folding angle between the two facets. The folding angle is configured to be adjustable to achieve a variable stiffness when loaded in a vertical direction of the folded panel, covering positive stiffness to negative stiffness.

Abstract: Provided are a chitin-based superabsorbent materials and method of preparation thereof. The superabsorbent material comprises chitin crosslinked by an epoxy crosslinker, and guanidine attached to the crosslinked chitin. The preparation method includes dissolving chitin in an aqueous solvent to form a solution; reacting the dissolved chitin with an epoxy crosslinker and guanidine, or a salt thereof, thereby forming a hydrogel; and drying the hydrogel.

Abstract: Origami-based contact members, devices and systems used for active mechanical haptics. The origami-based contact member includes a top plate, a bottom plate, and at least one piece of a curved origami-based metamaterial interposed therebetween, with its top end fixed to the top plate and its bottom end fixed to the bottom plate, the top plate is exposed to be contacted by a user's body site. The metamaterial includes a panel having a single curved crease extending in its longitudinal direction, which divides the panel into two facets. The panel is foldable along the single curved crease to form a folding angle between the two facets. The folding angle is adjustable by rotating the bottom plate to achieve a variable stiffness when loaded in a vertical axis between the top and bottom plates, covering positive stiffness to negative stiffness, to be perceived by the user's body site via contact with the top plate.

Abstract: A curved origami-based metamaterial includes a panel of material having a plurality of curved creases each disposed within a plane of the panel. The panel is configured to be folded along one of the plurality of creases, and the panel is also configured to be bent about an axis disposed outside the plane of the panel. Stiffness manipulation is configured to be achieved in situ by activating a different one of the plurality of curved creases.

Abstract: Provided is a method for preparing a crosslinked polyvinyl chloride structure foamed material by using a physical foaming agent, comprising: melting and mixing a polyvinyl chloride resin, a modified resin, an isocyanate, an anhydride, a nucleating agent and a heat stabilizer to obtain a blank; immersing the blank into a foaming gas for foaming to obtain a foamed body; and subjecting the foamed body to crosslinking curing to obtain a crosslinked polyvinyl chloride structure foamed material. According to the present invention, the crosslinked polyvinyl chloride structure foamed material is prepared by means of a brand-new process route, and the composition and proportion of the PVC resin and other raw materials can be adjusted in a wide range; and carbon dioxide or nitrogen is used for foaming. Further provided is a crosslinked polyvinyl chloride structure foamed material.

Abstract: Systems and methods are presented for a swallowable pH sensor made entirely of edible and digestible materials. A substrate is provided and an electrical circuit pattern is printed on a top surface of the substrate. The electrical circuit pattern includes a plurality of interdigitated electrodes and an antenna portion. The substrate is rolled into a cylindrical form such that the interdigitated electrodes are positioned on an outermost layer of the rolled substrate. The rolling of the substrate also causes the antenna portion of the electrical circuit pattern to form into a coil shape.

Abstract: A metamaterial system for protecting a payload from external energy flux generated by an energy source includes a mechanical, metamaterial framework configured to circulate the external energy flux between the metamaterial system and the energy source.

Abstract: Methods, systems, and apparatus, including biological fluid monitoring systems comprising a microneedle layer; at least one electromagnet assembly; and at least two liquid chambers coupled via a microfluidic layer, wherein the microneedle layer comprises a plurality of microneedles configured to extract interstitial fluid (ISF) from a patient in to one of the at least two liquid chambers, and wherein the at least one electromagnet assembly is configured to a move a test sample of the extracted ISF through the at least two liquid chambers to conduct a test cycle.

Abstract: An Augmented Reality (AR) scene image processing method, an electronic device and a storage medium are provided. The method includes that: shooting pose data of an AR device is acquired; presentation special effect data of a virtual object corresponding to the shooting pose data in a reality scene is acquired based on the shooting pose data and position pose data of the virtual object in a three-dimensional scene model representing the reality scene; and an AR scene image is displayed through the AR device based on the presentation special effect information.

Abstract: A metamaterial system for protecting a payload from external energy flux generated by an energy source includes a mechanical, metamaterial framework configured to circulate the external energy flux between the metamaterial system and the energy source.

Abstract: An electrode includes a soft substrate, a metal layer in direct contact with the soft substrate, and a lithium layer formed directly on the metal layer, wherein the metal layer comprises wrinkles. The wrinkles are of a substantially uniform height, and the height is in a range of 100 nm to 20 ?m. The wrinkles are typically separated by a substantially uniform distance, and the distance is in a range of 100 nm to 1000 ?m. The wrinkles may be one dimensional or two dimensional. Fabricating an electrode includes forming a metal layer on a soft substrate, and forming a lithium layer on the metal layer. Forming the lithium layer on the metal layer yields uniform wrinkles in the metal layer. A battery may include the electrode as described.

Abstract: A curved origami-based metamaterial includes a panel of material having a plurality of curved creases each disposed within a plane of the panel. The panel is configured to be folded along one of the plurality of creases, and the panel is also configured to be bent about an axis disposed outside the plane of the panel.

Abstract: A foldable, waterproof case includes a first wall and a second wall coupled to the first wall. The first and second walls at least partially define a cavity within the case. A lid is coupled to the second wall and is configured to selectively cover the cavity. A hinge is disposed between the first wall and the second wall. The first wall is rotatable relative to the second wall between a first, expanded position of the case and a second, collapsed position of the case. In the first position, the cavity includes a first volume and in the second position, the cavity includes a second volume that is less than the first volume. The hinge provides a waterproof connection between the first and second walls in the first position and in the second position.

Abstract: An image depth estimation method, including: obtaining a reference frame corresponding to a current frame and an inverse depth space range of the current frame; performing pyramid downsampling processing on the current frame and the reference frame respectively to obtain k layers of current images corresponding to the current frame and k layers of reference images corresponding to the reference frame, where k is a natural number greater than or equal to 2; and performing inverse depth estimation iteration processing on the k layers of current images based on the k layers of reference images and the inverse depth space range to obtain inverse depth estimation results of the current frame.

Abstract: A point cloud fusion method, an electronic device, and a computer storage medium are provided. The method includes: determining, according to at least two influence factors in scene information and/or camera information, depth confidences of pixel points in a current frame depth map, where the scene information and the camera information each at least includes one influence factor; and performing point cloud fusion processing on the pixel points in the current frame depth map according to the depth confidences.

Abstract: An Augmented Reality (AR) scene image processing method, an electronic device and a storage medium are provided. The method includes that: shooting pose data of an AR device is acquired; presentation special effect data of a virtual object corresponding to the shooting pose data in a reality scene is acquired based on the shooting pose data and position pose data of the virtual object in a three-dimensional scene model representing the reality scene; and an AR scene image is displayed through the AR device based on the presentation special effect information.

Abstract: Systems and methods are presented for a swallowable pH sensor made entirely of edible and digestible materials. A substrate is provided and an electrical circuit pattern is printed on a top surface of the substrate. The electrical circuit pattern includes a plurality of interdigitated electrodes and an antenna portion. The substrate is rolled into a cylindrical form such that the interdigitated electrodes are positioned on an outermost layer of the rolled substrate. The rolling of the substrate also causes the antenna portion of the electrical circuit pattern to form into a coil shape.

Abstract: An electrode includes a soft substrate, a metal layer in direct contact with the soft substrate, and a lithium layer formed directly on the metal layer, wherein the metal layer comprises wrinkles. The wrinkles are of a substantially uniform height, and the height is in a range of 100 nm to 20 ?m. The wrinkles are typically separated by a substantially uniform distance, and the distance is in a range of 100 nm to 1000 ?m. The wrinkles may be one dimensional or two dimensional. Fabricating an electrode includes forming a metal layer on a soft substrate, and forming a lithium layer on the metal layer. Forming the lithium layer on the metal layer yields uniform wrinkles in the metal layer. A battery may include the electrode as described.