Abstract:
A method of associating a mobile station to a base station in a wireless communication system comprises transmitting to a serving base station a scanning request message comprising an association indicator. The method also comprises receiving from the serving base station a scanning response message comprising a rendezvous time associated with a neighboring base station for initiating ranging with the neighboring base station, wherein the serving base station communicates an association notification to the neighboring base station, the association notification comprising the rendezvous time. The method also comprises associating with the neighboring base station by transmitting a ranging request after passing of the rendezvous time determined from a transmission time of the scanning response message from the neighboring base station, wherein the rendezvous time is associated with a time the neighboring base station is expected to provide a non-contention based ranging opportunity for the mobile station.
Abstract:
A power source circuit includes an inductor, a reservoir capacitor, and a switching control part that generates ON/OFF control signals to each of first and second switches. The first switch is connected between a first power voltage terminal and a first node to form a first current path between the first power voltage terminal and the first node in response to a driving signal of the switching control part. The second switch is connected between the first node and a second power voltage terminal to form a second current path between the first node and the second power voltage terminal in response to the driving signal. The inductor is connected to the first node to provide an average voltage between the first power voltage terminal and the second power voltage terminal. The capacitor is connected in parallel with the inductor to store the average voltage.
Abstract:
This invention relates to a method of producing aromatics and olefins from oils derived from coal or wood, including partially saturating and cracking the oils derived from coal or wood in a hydrogenation and reaction area, separating them depending on the number of carbons, recirculating heavy oils having 11 or more carbons to the hydrogenation and reaction area, feeding oils suitable for producing BTX to an aromatic separation process and a transalkylation process to recover aromatics, and feeding hydrocarbonaceous components having 5 or less carbons to a light separation process, thus obtaining olefins.
Abstract:
A semiconductor device is provided having a free layer and a pinned layer spaced apart from each other. A tunnel barrier layer is formed between the free layer and the pinned layer. The pinned layer may include a lower pinned layer, and an upper pinned layer spaced apart from the lower pinned layer. A spacer may be formed between the lower pinned layer and the upper pinned layer. A non-magnetic junction layer may be disposed adjacent to the spacer or between layers in the upper or lower pinned layer.
Abstract:
A method for fabricating a large-area nanoscale pattern includes: forming multilayer main thin films isolated by passivation layers; patterning a first main thin film to form a first main pattern; forming a first spacer pattern with respect to the first main pattern; and forming a second main pattern by transferring the first spacer pattern onto a second main thin film. By using multilayer main thin films isolated by different passivation films, spacer lithography capable of reducing a pattern pitch can be repetitively performed, and the pattern pitch is repetitively reduced without shape distortion after formation of micrometer-scale patterns, thereby forming nanometer-scale fine patterns uniformly over a wide area.
Abstract:
The bottle cap, this invention, is designed to be suitable for the container necks of different size. As recommended, the bottle cap with two connection sections may be assembled in the container necks showing the different sizes of 26.78 MM and 28.0 MM.
Abstract:
A liquid crystal display according to exemplary embodiments of the present invention includes a first panel including a first lower substrate, a first lower electrode formed on the first lower substrate, a first upper substrate facing the first lower substrate, a first upper electrode formed on the first upper substrate, and a first cholesteric liquid crystal injected between the first lower electrode and the first upper electrode, wherein the first lower electrode includes carbon nanotubes. The liquid crystal display including the first lower electrode made of the carbon nanotubes without a light absorption layer provides a simple structure capable of realizing a black state.
Abstract:
Valuable metals such as cobalt, nickel, manganese, and lithium can be economically recovered from various lithium secondary battery-related wastes by the inventive method which comprises liquid-phase leaching a scrap powder containing Co, Ni, Mn, and Li, and purifying and solvent-extracting the resulting leaching solution to recover each of said Co, Ni, Mn, and Li, wherein the liquid-phase leaching is performed by a two-step counter-current leaching using an inorganic acid solution or a mixed solution of an inorganic acid and hydrogen peroxide.
Abstract:
The present invention relates to an overvoltage repetition prevention circuit, a method thereof, and a power factor correction circuit including the same. The power factor correction circuit includes: an inductor receiving an input voltage and supplying an output voltage; a power switch connected to the inductor and controlling an inductor current to the inductor; and a power factor correction controller differently controlling a control structure generating a control voltage controlling a switching operation of the power switch during a predetermined overvoltage stabilization period generated in synchronization with a time that an output voltage is an overvoltage and the control structure generating the control voltage in a normal state in which the output voltage is not the overvoltage, wherein the control structure is determined according to a difference between the output voltage and a predetermined output target voltage during the overvoltage stabilization period.
Abstract:
This invention relates to a petroleum refining method for producing high value-added clean petroleum products and aromatics (Benzene/Toluene/Xylene) together, by which low pollution petroleum products including liquefied petroleum gas or low-sulfur gas oil and aromatics can be efficiently produced together from a fluid catalytic cracked oil fraction.