Abstract:
A handoff method in a wireless local area network (WLAN) and an apparatus using the same are provided. A mobile station (MS) switches between a data transceiving mode and a probing mode at a predefined interval when the MS is transmitting/receiving packages. In the probing mode, the MS probes one or more channels each time and selects an access point (AP) for handoff from the probing result according to a predetermined rule, so as to re-establish a network connection.
Abstract:
A method for anodizing magnesium products, the method includes the steps of: providing an electrolyte, the electrolyte including a base solution, a blackening agent, and a complexing agent; putting a substrate material as an anode in the electrolyte, and putting another material as a cathode in the electrolyte; and supplying power between the anode and the cathode until a black coating is formed on the substrate material.
Abstract:
A variable configuration articulated tracked vehicle comprises a chassis, a pair of right and left drive pulleys, a right and left planetary wheel, a right and left track, a right and left arm mechanism, and a right and left drive motor. The drive pulleys are rotatably attached to the chassis and each pair of drive pulleys is in the same plane. The planetary wheels are movable relative to the chassis such that each planetary wheel is in the same plane as its respective drive pulleys. The tracks extend around the pair of drive pulleys and the planetary wheel on the respective sides. The arm mechanisms connect the respective planetary wheel to the chassis. Each arm mechanism is rotatably attached to the chassis with a cam. The cam defines a motion path of one end of the arm whereby the motion of the planetary wheel provides a path for the planetary wheel such that the track path defined by the respective drive pulleys and the planetary wheel is a constant track length. The motors are each operably connected to the respective pair of drive pulleys for driving the track.
Abstract:
A method for fabricating a thermal inkjet head equipped with a symmetrical heater and the head fabricated by the method are provided. The method incorporates two thick photoresist deposition processes and a nickel electroplating process. The first thick photoresist deposition process is carried out to form an ink chamber in fluid communication with a funnel-shaped manifold and an injector orifice. The second thick photoresist deposition process forms a mold for forming an injector passageway that leads to the injector orifice. The nickel electroplating process provides an orifice plate on top of the inkjet head through which an injector passageway that leads to the injector orifice is provided for injecting ink droplets.
Abstract:
A variable configuration articulated tracked vehicle comprises a chassis, a pair of right and left drive pulleys, a right and left planetary wheel, a right and left track, a right and left arm mechanism, and a right and left drive motor. The drive pulleys are rotatably attached to the chassis and each pair of drive pulleys is in the same plane. The planetary wheels are movable relative to the chassis such that each planetary wheel is in the same plane as its respective drive pulleys. The tracks extend around the pair of drive pulleys and the planetary wheel on the respective sides. The arm mechanisms connect the respective planetary wheel to the chassis. Each arm mechanism is rotatably attached to the chassis with a cam. The cam defines a motion path of one end of the arm whereby the motion of the planetary wheel provides a path for the planetary wheel such that the track path defined by the respective drive pulleys and the planetary wheel is a constant track length. The motors are each operably connected to the respective pair of drive pulleys for driving the track.
Abstract:
A nitride based semiconductor laser diode device comprising a selective growth mask with a grating structure is proposed. The island-like stacked epitaxial layers including the P-type cladding layer is formed from the selective growth mask upon the active layer of the semiconductor laser structure. This proposed structure can reduce the strain by the deformation due to the isolate structure. Thus, increase of thickness of the cladding layer and/or increase of composition difference can be achieved without crack existing in the island-like stacked epitaxial layers. The optical confinement can be effectively improved.
Abstract:
On a semiconductor substrate, a transistor and a capacitor electrically connected to the transistor are formed, the capacitor having two electrodes made of metal and a capacitor dielectric layer between the two electrodes made of oxide dielectric material. A temporary protective film is formed over the capacitor, the temporary protective film covering the capacitor. The semiconductor substrate with the temporary protective film is subjected to a heat treatment in a reducing atmosphere. The temporary protective film is removed. The semiconductor substrate with the temporary protective film removed is subjected to a heat treatment in an inert gas atmosphere or in a vacuum state. A protective film is formed over the capacitor, the protective film covering the capacitor. With these processes, leak current of the capacitor can be reduced.
Abstract:
A device for compensating a semiconductor memory defect, suitable for use in a semiconductor memory, is provided. The device includes a memory array, having at least a defectless sub-memory region, the memory array being coupled to an address decoder circuit and a sensing circuit for storing data. A selection circuit is coupled to a control unit and outputs a selection signal to the control unit. A first input address buffer is coupled to the control unit and the address decoder circuit, and outputs an address signal to the address decoder circuit in response to the selection signal for selecting the defectless sub-memory region to store data. A method for compensating a semiconductor memory defect is also provided, including determining whether the memory region of the semiconductor memory has a defect; and replacing the memory region with the defectless sub-memory region to store data when the semiconductor memory is defective.
Abstract:
A circuit board contained in a circuit board holder forms a server blade that fits into a bay of a server blade enclosure. The circuit board permits standard electrical components to fit within the cross-sectional width of the server blade. The server blade in cross section may be generally triangular, L-shaped or another type of polygon that permits placement of tall components that otherwise would not fit in a generally rectangular server blade.