Abstract:
A parallel-structured Raman optical amplifier includes a very wide gain band for use in Coarse Wavelength Division Multiplexing (CWDM) scheme—based optical transmission. The parallel-structured Raman optical amplifier for amplifying an input optical signal of a plurality of channels having different center wavelengths received via a single optical path includes: a demultiplexer for dividing the input optical signal into a plurality of optical signals, each of which is composed of at least one channel signal having an adjacent center wavelength, and outputting the divided optical signals to different output terminals; a plurality of Raman amplifiers for performing Raman-optical amplification upon the divided optical signals received from the demultiplexer; and a multiplexer for receiving individual optical signals from the plurality of Raman amplifiers, and outputting the received optical signals via a single optical path.
Abstract:
An apparatus and method for estimating a tire life is provided. The apparatus includes a transmitter for storing tire position identification information, measuring and transmitting an internal pressure and temperature together with the tire position identification information; a receiver for detecting and comparing the tire position identification information and the internal pressure and temperature, with tire replacement temperature reference value and pressure reference value, and if any one of the internal pressure and temperature is greater than the tire replacement temperature reference value and pressure reference value, generating a warning signal for informing of tire replacement; and a warning unit for receiving the warning signal and warning a driver.
Abstract:
The present invention provides a bill separator using frictional force, including a gate roller and a feeding roller which rotate in close contact with front and rear surfaces of a bill, respectively, to separate and discharge bills one by one, wherein the gate roller is formed of a material with a friction coefficient higher than that of the bill and constructed not to rotate in a bill-discharging direction, the feeding roller is formed of a material with a friction coefficient higher than that of the gate roller and constructed to rotate in the bill-discharging direction and to come into close contact with or be spaced apart from the gate roller, and an elastic means is further provided for causing the feeding roller to be in close contact with the gate roller with a certain magnitude of elastic force. With the bill separator using frictional force according to the invention, bills can be correctly discharged one by one so that the number of bills discharged can be coincident with the number of bills requested, and the bill separator can be easily installed and repaired without a skilled person and a special jig since possible abnormal changes in a gap between the gate roller and the feeding roller can be overcome simply by replacing the elastic means.
Abstract:
Air conditioner including a case having air inlet and outlet passages therein perpendicular to each other, and a plurality of air inlet and outlets at ends of the air inlet and outlet passages, a regenerative heat exchanger at a cross point of the air inlet and outlet passages for making indirect heat exchange of the external air and room air flowing through the air inlet and outlet passages, a compressor, a flow path control valve for shifting, and guiding a flow path of refrigerant from the compressor proper to respective operation modes, first and second heat exchangers, an expansion device, a first fan in the air inlet passage for blowing external air into a room through the first heat exchanger, and a second fan in the air outlet passage for blowing the room air to an exterior through the second heat exchanger, thereby ventilating as well as heating or cooling the room at the same time.
Abstract:
In an IPS mode LCD device and method, a plurality of sub-blocks are utilized to maintain a maximum transmittance even when a voltage above a predetermined value is applied to the device. The IPS mode LCD device includes a common electrode including a plurality of first segments and a plurality of second segments to define a plurality of blocks, wherein the plurality of first segments are formed substantially parallel to the gate line in the pixel region, and the plurality of second segments are formed substantially parallel to the data line, and connected to the first segments; and a pixel electrode including a plurality of third segments and at least one fourth segment, and being connected with a drain electrode of the thin film transistor, wherein each of the third segments is positioned between the first segments, and the at least one fourth segment connects the third segments.
Abstract:
Compressor including a chamber having a muffler room therein for introducing refrigerant compressed at a compression part, a cover on top of the chamber for closing an upper part of the muffler room, and a discharge muffler including a first coating gasket having a base part with coated layers on upper and lower surfaces for sealing between the chamber and the cover, thereby reducing noise and simplifying assembly.
Abstract:
A duty cycle correction circuit includes a duty cycle correction portion that is configured to output a correction signal that is obtained by correcting a duty cycle of an input signal and to output a delayed signal that is obtained by delaying the correction signal, a complementary portion that is configured to output a complementary signal that is the complement of the delayed signal, and a phase interpolator that is configured to phase interpolate the complementary signal and the correction signal.
Abstract:
Compressor including a chamber having a muffler room therein for introducing refrigerant compressed at a compression part, a cover on top of the chamber for closing an upper part of the muffler room, and a discharge muffler including a first coating gasket having a base part with coated layers on upper and lower surfaces for sealing between the chamber and the cover, thereby reducing noise and simplifying assembly.
Abstract:
A content providing system and method for a streaming service are provided. The content providing system is connected to at least one of wired/wireless terminals and a wide area server. The content providing system includes at least one of local servers and a manage node. The local servers store contents received from the wide area server and provide context index information. The managing node manages the context index information by the contents stored in the local servers and the wide area server, and determines a storing location of a corresponding content from the context index information if a content request message is received from a terminal. Also, the managing node transmits the requested content to the terminal through a wired/wireless Internet network by transmitting a content-transmission message to local servers having the corresponding content or the wide area server.
Abstract:
The present invention relates to a novel method for preparing a catalyst of the formula (1), WOx wherein, W represents tungsten atom, O represents oxygen atom x represents a value determined by oxidative state of W, for partial oxidation of methylbenzenes, the method comprising: (a) a step of preparing tungsten oxide slurry by wet milling; (b) a step of supporting the slurry obtained in the step (a) on fire-resistance inorganic carrier by impregnation; (c) a step of drying the catalyst obtained in the step (b); and (d) a step of calcining the dried catalyst obtained in the step (c), and can reduce the reaction temperature on the basis of equivalent yield in the preparation of corresponding aromatic aldehyde from methylbenzenes since the catalyst has increased the surface areas compared to the conventional one, and thus has high conversion rate.