Abstract: A network quality measurement method and system are provided. In the method, a movement path and a movement speed of a vehicle device are determined according to a size of a space and an endurance time of the vehicle device, and the vehicle device is controlled to move on the movement path at the movement speed. During a movement of the vehicle device, a network quality in the space is measured according to a measurement frequency to generate network quality data. Whether the network quality in the space is changed is determined according to the network quality data. Whether there is an obstacle around the vehicle device is detected. When it is determined that the network quality in the space is changed or the obstacle is detected around the vehicle device, at least one of the movement path, the movement speed, and the measurement frequency is adjusted.

Abstract: A magnetoresistive random access memory (MRAM) device includes a first array region and a second array region on a substrate, a first magnetic tunneling junction (MTJ) on the first array region, a first top electrode on the first MTJ, a second MTJ on the second array region, and a second top electrode on the second MTJ. Preferably, the first top electrode and the second top electrode include different nitrogen to titanium (N/Ti) ratios.

Abstract: The present disclosure describes an apparatus with a local interconnect structure. The apparatus can include a first transistor, a second transistor, a first interconnect structure, a second interconnect structure, and a third interconnect structure. The local interconnect structure can be coupled to gate terminals of the first and second transistors and routed at a same interconnect level as reference metal lines coupled to ground and a power supply voltage. The first interconnect structure can be coupled to a source/drain terminal of the first transistor and routed above the local interconnect structure. The second interconnect structure can be coupled to a source/drain terminal of the second transistor and routed above the local interconnect structure. The third interconnect structure can be routed above the local interconnect structure and at a same interconnect level as the first and second interconnect structures.

Abstract: The power input stabilizing circuit provides a first resistor at the input terminals to suppress impulse current. Then, the power passes through a power input limiting circuit including a non-polarity capacitor, a rectifier circuit formed by diodes, and a polarity capacitor so as to provide a current within a specific range to a load. A constant current circuit including a third resistor, a diode, a fourth resistor, and a transistor is then employed to stabilize the load current. The performance and durability of the electrical or electronic appliance using the power input stabilizing circuit are therefore enhanced significantly.

Abstract: A battery chamber of button-cell batteries for consumer electronic devices is provided herein, which mainly contains a top member and a bottom member joined together to form a number of cell rooms for the accommodation of the button-cell batteries. A number of conduction plates covers the top and bottom of the cell rooms and electrically connects the button-cell batteries into a series connection. The thickness of the top and bottom members is roughly one half of a standard button-cell battery. The top and bottom members can be easily pried open for the installation and removal of the button-cell batteries.

Abstract: A refractive coaster includes a bottom cover, a circular seat mounted on the bottom cover, a plurality of batteries fitted inside the seat, a printed circuit board arranged on the bottom cover and electrically connected with the batteries and provided with an annular ring-like electrode and a plurality of light-emitting members, a conducting pin having an immediate portion formed with a flange and having a lower end extending downwardly through the annular ring-like electrode, a spring fitted on an upper end of the conducting pin and urging the lower end of the conducting pin to move downwardly out the bottom cover, a bowl-shaped base made of transparent material and having an opening at a central portion thereof and a mirrored surface at an upper side thereof, the bowl shaped base being fitted in the circular seat with the light-emitting members protruding upwardly out of the opening, a circular lid made of transparent material and arranged on the base and having a bottom side formed with a mirrored surface

Abstract: A variable resistor includes a circuit board having a conductive layer and a plurality of impedance layers arranged under the conductive layer, a slide having a metal contact plate movably mounted over the conductive layer and the impedance layers, wherein the impedance layers and the conductive layer have electric contacts respectively connected to circuit devices, output potentials at the electric contacts being relatively changed when the slide is moved with over the metal conductive layer and the impedance layers thereby controlling current flowing through the circuit devices.