The technology provides for an extension member configured to direct a magnetic field from a magnet to a Hall Effect sensor to facilitate detection of magnetic field. By varying the dimensions of the extension member, which may be any arbitrary shape, the relative positions of the magnet and the Hall Effect sensor may be less constrained by the reach of the magnetic field of the magnet, thereby allowing more design possibilities. The extension member may be used in a case, where the extension member may facilitate detection of whether the case is open or closed, the extension member may further provide magnetic attraction to keep the case closed.

According to an embodiment of the present invention, an electronic device cover includes: a first plate that can be attached/detached to/from one surface of the electronic device; a second plate overlappingly coupled to the first plate; and a third plate which is connected to the second plate by a hinge and of which the angle formed with the first plate changes according to rotation with respect to the second plate, wherein the second plate and/or the third plate includes a composite material sheet, and at least a portion of the hinge can be positioned inside the composite material sheet. Other various embodiments are possible.

A non-destructive testing (NDT) system which includes a chassis, a NDT scanner which may be an ultrasound scanner, a drive system comprising at least one drive wheel and at least one drive motor, a guidance system operatively connected to the drive system for controlling the motion of the NDT system, and a magnet assembly for adhering the NDT 5 system to a ferromagnetic object, which magnet assembly is configured to be switched on or off as required.

A device that provides an Interchangeable Bag Systems for handbags, purses, and similar containers for the carriage of personal articles; the device has a removable and separate liner which is a quick-change bag and interchangeable sections with a central core member; the device is made with a core section, a pair of exterior surfaces of core section, a pair of interchangeable bag cover panels, a manner to attach the cover panels to the core, and carrying strap with a way to removably attach strap to core.

A magnetic buckle device has a buckle main body and an inserting head. When the inserting head is close to an insertion hole of the buckle main body, the magnetic attraction force between a first component on the inserting head and a second component on the buckle main body can assist with inserting the inserting head into the insertion hole. After the inserting head is inserted to a predetermined position, the magnetic attraction force will keep the buckle main body in an engaged state even without any additional fixing means. When the buckle main body is switched to a disengaged state and the inserting head is moved out of the buckle main body, the magnetic attraction force attracts the inserting head to attach to the buckle main body, and thereby, after moved out, the inserting head cannot move arbitrarily.

A hydration pack includes a main body, a strap, a bladder, a hydration tube, a first chain of magnets, and a second chain of magnets. The main body defines a storage compartment. The strap is coupled to the main body. The bladder is disposed in the storage compartment of the main body and configured to retain liquid. The hydration tube includes a proximal end coupled to the bladder and a distal end. The first chain of magnets is disposed on the strap. The second chain of magnets is disposed along a length of the hydration tube. The first and second chains of magnets are configured to connect by magnetic forces and disconnect by a force exceeding the magnetic force of the first and second chains of magnets.

An item may be provided with a body that forms an enclosure. The body (12) may have body portions (16, 18) that open and close along a seam (14). An elongated magnetic fastener (36) may run along the seam. The magnetic fastener may have first (38) and second (40) portions on opposing sides of the seam. The first and second portions may include magnets. When the magnetic fastener is operated in a closed state, the magnets in the first and second portions attract each other and pull the first and second portions of the fastener together to close the seam. When the magnetic fastener is operated in an open state, the magnets in the first and second portions repel each other and push the first and second portions of the fastener apart to open the seam.

The present invention provides a method for performing a graph-based prediction using a graph signal including obtaining a context signal; generating a graph signal based on a graph parameter set; obtaining a graph-based transform matrix based on the graph signal, wherein the graph-based transform matrix includes an eigenvector; obtaining a prediction vector using an optimal transform vector calculated through an optimization function; and generating a prediction signal using the prediction vector, where the optimization function has the context signal, an eigenvalue of a graph Laplacian matrix and the eigenvector as a variable.

Art object storage bag includes a first accommodation portion and a second accommodation portion that can be closed and opened by a zipper. The object storage bag includes a first magnetic storage board and a second magnetic storage board, and each of the first magnetic storage board and the second magnetic storage board includes a magnetic material, and a first side of the first magnetic storage board has a magnetic pole same as that of the first side of the second magnetic storage board, and each of the first magnetic storage board and the second magnetic storage board has a multiple of accommodation spaces.