摘要:
Disclosed herein is an Ultra WideBand (UWB) M-ary Code Shift Keying (MCSK)/Binary Pulse Position Modulation (BPPM) wireless communication system and method. The system includes a transmitter and a receiver. The transmitter selects a specific TH code using MCSK according to an additional data stream, performs BPPM on a desired signal according to the selected TH code, and transmits the modulated signal via a channel. The receiver receives the signal transmitted from the transmitter via the channel, and estimates the transmitted signal, which is transmitted from the transmitter, through detection of a Maximum Likelihood (ML) sequence.
摘要:
An optical sheet includes a substrate onto which light is incident, and a convex part protruded from the substrate by a predetermined thickness. A thickness of the convex part increases from an edge to a center thereof.
摘要:
A method of fabricating a vertical structure nitride semiconductor light emitting device having a cross-sectional shape of a polygon having five or more sides or a circle. A light emitting structure is formed on a sapphire substrate. A metal layer having a plurality of patterns is formed on the light emitting structure. The patterns of the metal layer each have a shape corresponding to a cross-sectional shape of a wanted final light emitting device and are spaced apart by a predetermined distance such that an upper surface of the light emitting structure is partially exposed. The light emitting structure is divided into a plurality of individualized light emitting structures by removing the light emitting structure below the exposed region between the patterns of the metal layer. The sapphire substrate is separated from the light emitting structure by irradiating a laser beam.
摘要:
Disclosed are various embodiments that include a process, an arrangement, and an apparatus for boron diffusion in a wafer. In one representative embodiment, a process is provided in which a boric oxide solution is applied to a surface of the wafer. Thereafter, the wafer is subjected to a fast heat ramp-up associated with a first heating cycle that results in a release of an amount of boron for diffusion into the wafer.
摘要:
A method of processing a call to an unregistered user in a Wireless Local Area Network (WLAN)-General Packet Radio Service (GPRS) using a Session Initiation Protocol (SIP) is provided. The method of connecting a call to a mobile node present in a GPRS area includes registering location information of the mobile node to be invited in a Home Subscriber Server (HSS); when the mobile node uses a Mobile Internet Protocol (MIP), allocating an Internet Protocol (IP) address to the mobile node and authenticating the mobile node through MIP registration and setting a SIP session; and when the mobile node uses a simple IP, allocating an IP address to the mobile node and authenticating the mobile node through a Dynamic Host Configuration Protocol (DHCP) procedure and setting a SIP session.
摘要:
Disclosed is a printed circuit board (PCB) having a thin core layer and a method of fabricating the same. In the method, a substrate, where a copper foil is formed on a release film and a prepreg, is employed as a base substrate and a core insulating layer is removed after the fabrication of the PCB, thereby reducing the thickness of the final product.
摘要:
The present invention relates to a burning type gas scrubbing method using an electrical energy and a fossil energy at the same time, and a gas scrubber implementing the method. The gas scrubber has a burning chamber, the burning chamber comprising an inner casing defining a burning room; at least a gas inlet for introducing the waste gas into the burning room; an air inlet for introducing air into the burning room; and an electrical heater disposed on an outer circumference of the burning room and connected to a power source through a power supply line. The burning room comprises an ignition fuel port for introducing an ignition fuel into the burning chamber when the temperature of the burning room rises above a predetermined temperature, an ignition sensor for a flame generated by injecting the ignition fuel, and a main fuel port for supplying a large amount of fuel when the ignition sensor senses an ignition flame. According to the gas scrubbing method and the gas scrubber of the present invention, the electrical energy and the fossil energy are used together, thereby enhancing the energy efficiency and the gas scrubbing efficiency at the same and decreasing the emission of CO2 gas.
摘要:
The present invention provides a nitride based semiconductor device comprising an active layer having a quantum well layer and a quantum barrier layer, wherein the device includes an electron emitting layer formed of at least two repeats of a first nitride semiconductor layer and a second nitride semiconductor layer having different compositions between a n-type nitride semiconductor layer and the active layer, the first nitride semiconductor layer has an energy band gap greater than that of the quantum well layer, smaller than that of the quantum barrier layer, and decreasing closer to the active layer, and the second nitride semiconductor layer has an energy band gap at least higher than that of the adjacent first nitride semiconductor layer(s) and has a thickness capable of tunneling electrons.
摘要:
A drum washing machine includes a cabinet including an opening at a front wall of the cabinet to allow laundry to be put into or taken out of the cabinet, a door at the front wall of the cabinet to open or close the opening of the cabinet, and a door opening/closing mechanism connected between the cabinet and the door to move the door above the cabinet when opening the door such that a front surface of the door is upwardly directed when the door is open, and to move the door toward the front wall of the cabinet when closing the door. The door is usable as a laundry holder when the door is open.
摘要:
Disclosed is a lithium secondary battery comprising a cathode (C), an anode (A), a separator and an electrolyte, wherein the electrolyte comprises: (a) a nitrile group-containing compound and (b) a compound having a reaction potential of 4.7V or higher. The lithium secondary battery can prevent the problems caused by a nitrile group-containing compound added to the electrolyte for the purpose of improving high-temperature cycle characteristics and safety (such problems as a battery swelling phenomenon and a drop in recovery capacity under high-temperature (>80° C.) storage conditions), by adding a fluorotoluene compound.