Abstract: Various devices, methods and systems are provided for aging-sensitive chip authentication. In one example, among others, a chip includes a reference Schmitt trigger ring oscillator (STRO) configured to enter a sleep mode during operation of the chip; a stressed STRO; a VDD charge pump configured to boost a positive voltage supplied to the stressed STRO during operation of the chip; and/or a GND charge pump configured to under-drive a ground voltage supplied to the stressed STRO during operation of the chip. In another example, a method includes detecting activation of a chip including a reference STRO and a stressed STRO and, in response to the activation of the chip, initiating sleep mode operation of the reference STRO. In response to the activation of the chip, a VDD voltage supplied to the stressed STRO can be boosted and/or a GND voltage supplied to the stressed STRO can be under-driven.

Abstract: A semiconductor structure includes a substrate, at least one first conductive structure, at least one second conductive structure, at least one first memory structure, and at least one second memory structure. The substrate has an array region and a dummy region. The first conductive structure is disposed on the array region. The second conductive structure is disposed on the dummy region. The first memory structure is disposed on the first conductive structure. The first memory structure includes a first channel layer, and the first channel layer is in contact with the first conductive structure. The second memory structure is disposed on the second conductive structure. The second memory structure includes a second channel layer, and the second channel layer is isolated from the second conductive structure.

Abstract: A water cooling system includes a temperature control device which is connected with a first heat exchanger. A second heat exchanger includes a water temperature control path and a constant temperature water path. The water of the first heat exchanger is controlled by the temperature control device and flows to the water temperature control path. The water in the constant temperature water path tows through the second heat exchanger to proceed heat exchange with the water in the water temperature control path, and then flows to the target equipment. The temperature difference of the water flowing to the target equipment is smaller than that of conventional water cooling system.

Abstract: A printed circuit board is provided. The printed circuit board includes N power layers and a first via group. The N power layers are arranged in parallel and spaced from each other. The first via group includes M rows of vias which are disposed through the N power layers, where N and M are positive integers greater than 0. Each row of the M rows of vias is electrically connected to the first layer of the N power layers. A Pth row of the M rows of vias is further electrically connected to Q power layers of the N power layers respectively, where Q is a smallest positive integer greater than or equal to P((N?1)/M), and P is a positive integer less than or equal to M.

Abstract: A water cooling system includes a temperature control device which is connected with a first heat exchanger. A second heat exchanger includes a water temperature control path and a constant temperature water path. The water of the first heat exchanger is controlled by the temperature control device and flows to the water temperature control path. The water in the constant temperature water path tows through the second heat exchanger to proceed heat exchange with the water in the water temperature control path, and then flows to the target equipment. The temperature difference of the water flowing to the target equipment is smaller than that of conventional water cooling system.

Abstract: A luminous electronic clock includes a multi-diameter forward tapered case frame; a transparent plate installed in a front circumferential edge of the case frame with a sealing ring mounted between them; a dial spaced behind the transparent plate and having time markers, temperature numbers and humidity numbers provided thereon; clock, thermometer and hygrometer movements mounted on a back side of the dial; hands of the clock and pointers of the thermometer and the hygrometer mounted on movement shafts and located on a front side of the dial; a set of LED lights installed around the clock movement shaft and located behind the dial; battery holders mounted behind the dial; and a case back fixedly held to a rear circumferential edge of the case frame by retaining springs and having windows corresponding to the movements and the battery holders.

Abstract: A light-emitting clock has a case, a dial, a light-emitting mechanism, a movement and a plurality of hands. The case has a front cover, a back cover and a washer. The front cover is coupled to the back cover. The washer is disposed between the front cover and the back cover. The dial is disposed between the washer and the back cover. The light-emitting mechanism has a switch, a power unit electrically connected to the switch, and at least one lamp strip electrically connected to the switch. The switch and the power unit are disposed on the back cover. The lamp strip is annularly disposed at the washer. A light-emitting surface of the lamp strip at least faces the rim of the dial. The movement is disposed on the back cover. The hands are coupled to the movement and correspond in position to one side of the dial.

Abstract: A ceiling fan includes a motor and a heat-dissipating device. The heat-dissipating device includes a plurality of blades and a plurality of end plates. The motor includes a shaft and a hub. The hub includes a plurality of vents and a plurality of first coupling portions. Each blade is coupled with at least one first coupling portion and includes a first end and a second end. Each blade forms a second coupling portion at the first end thereof. The second coupling portion is coupled with the at least one first coupling portion. Each blade includes a first air channel extending in a radial direction. The first air channel includes first and second ends. The first end of the first air channel is relatively adjacent to the vents than the second end is. Each end plate includes at least one third coupling portion coupled with the second end of the blade.

Abstract: A flow guiding device includes a flow-guiding member and a blade. The flow-guiding member includes a flow-guiding portion, a neck portion and a first coupling portion. The flow-guiding portion is connected to a first end of the neck portion. The first coupling portion is located at a second end of the neck portion. The flow-guiding portion, the neck portion and the first coupling portion are connected in series in a radial direction. The blade includes a second coupling portion at a free end of the blade. The second coupling portion is coupled with the first coupling portion. The flow-guiding portion has a cross-sectional area smaller than or equal to a cross-sectional area of the blade. A cross-sectional area of the neck portion viewed from the radial direction at the first end is smaller than a cross-sectional area of the neck portion viewed from the radial direction at the second end.

Abstract: A luminous electronic clock includes a multi-diameter forward tapered case frame; a transparent plate installed in a front circumferential edge of the case frame with a sealing ring mounted between them; a dial spaced behind the transparent plate and having time markers, temperature numbers and humidity numbers provided thereon; clock, thermometer and hygrometer movements mounted on a back side of the dial; hands of the clock and pointers of the thermometer and the hygrometer mounted on movement shafts and located on a front side of the dial; a set of LED lights installed around the clock movement shaft and located behind the dial; battery holders mounted behind the dial; and a case back fixedly held to a rear circumferential edge of the case frame by retaining springs and having windows corresponding to the movements and the battery holders.

Abstract: A retractable virtual reality device includes a rear cover, a front cover, a first restraining component, a second restraining component, and a display module. The front cover is movably combined with the rear cover. The first restraining component is fixed on the front cover. The second restraining component is movably disposed on the rear cover and for restraining the first restraining component. The display module includes a sleeve, a lens, and a display. The sleeve is fixed on the rear cover. The lens is disposed on a side of the sleeve. The display is disposed on the front cover and movably combined with the other side of the sleeve. By cooperation of the first restraining component and the second restraining component, the display and the front cover are movable relative to the lens and the rear cover, which reduces an overall size of the virtual reality device for easy carry.

Abstract: A multifunctional timepiece with LED illuminating system mainly includes a case frame, a movement, a set of hands, a dial, a main body of the timepiece, a set of LED lights, a light transmissible plate, a power supply and a control device. The LED lights are fixed to a circumferential edge of the light transmissible plate; the light transmissible plate is located above the dial, the hands are located above the light transmissible plate, and the light transmissible plate is provided with markers, which are consistent with those provided on the dial. The set of LED lights includes at least three LED lights, which are equally spaced and electrically connected to a set of wires in series or in parallel. The control device can be a photosensitive control element or a manual control switch. The timepiece can further include a thermometer and a hygrometer located within the case frame.

Abstract: A safety device for motor vehicle includes a microprocessor having set therein a tilt angle default value, a controller coupled with the ignition device and brake device of the motor vehicle, an angle sensor mounted to the body of the motor vehicle and an operator sensor installed in the directional control device. The microprocessor activates the controller to turn off the ignition device and to actuate the brake device if the motor vehicle is tilted excessively or when the operator goes out of the sensing range of the operator sensor, avoiding danger.

Abstract: A three-dimensional semiconductor device is provided, includes a substrate having an array area and a staircase area; a stack structure having multi-layers formed on the substrate, and the multi-layers comprising conductive layers alternating with insulating layers on the substrate, the stack structure comprising cell-stacks formed on the substrate and disposed in the array area; a conductive channel formed on the substrate and disposed by extending vertically to the multi-layers in the array area; a conductive plug formed on the conductive channel; and a plug contact formed on the conductive plug. The conductive plug includes a polysilicon portion formed on and electrically connected to the conductive channel, and a metal-containing portion formed on the polysilicon portion, wherein the plug contact is electrically connected to the metal-containing portion.

Abstract: Various devices, methods and systems are provided for aging-sensitive chip authentication. In one example, among others, a chip includes a reference Schmitt trigger ring oscillator (STRO) configured to enter a sleep mode during operation of the chip; a stressed STRO; a VDD charge pump configured to boost a positive voltage supplied to the stressed STRO during operation of the chip; and/or a GND charge pump configured to under-drive a ground voltage supplied to the stressed STRO during operation of the chip. In another example, a method includes detecting activation of a chip including a reference STRO and a stressed STRO and, in response to the activation of the chip, initiating sleep mode operation of the reference STRO. In response to the activation of the chip, a VDD voltage supplied to the stressed STRO can be boosted and/or a GND voltage supplied to the stressed STRO can be under-driven.

Abstract: A flow guiding device includes a flow-guiding member and a blade. The flow-guiding member includes a flow-guiding portion, a neck portion and a first coupling portion. The flow-guiding portion is connected to a first end of the neck portion. The first coupling portion is located at a second end of the neck portion. The flow-guiding portion, the neck portion and the first coupling portion are connected in series in a radial direction. The blade includes a second coupling portion at a free end of the blade. The second coupling portion is coupled with the first coupling portion. The flow-guiding portion has a cross-sectional area smaller than or equal to a cross-sectional area of the blade. A cross-sectional area of the neck portion viewed from the radial direction at the first end is smaller than a cross-sectional area of the neck portion viewed from the radial direction at the second end.

Abstract: Disclosed herein, in certain embodiments, are compounds, methods, tools, and abrasive materials comprising mixed transition metal dodecaborides.