Abstract:
Provided is an organic light emitting diode employing a luminescent efficiency improvement layer containing a compound represented by Formula 1 below: The OLED including the luminescent efficiency improvement layer containing the compound represented by Formula 1 can have excellent luminescent efficiency.
Abstract:
The present invention relates to a 3-color multiplex CARS spectrometer. In the 3-color multiplex CARS spectrometer, Raman resonance is achieved for multiple molecular vibrations of a sample by the combination of a short-wavelength pump beam generated by a broadband laser light source and a long-wavelength Stokes beam generated by a stable laser light source, and another short-wavelength laser beam having a narrow linewidth is then introduced separately to serve as a probe beam that interacts with the laser-driven sample, thereby generating CARS spectral signals whose wavelength components can be resolved. Accordingly, the 3-color multiplex CARS spectrometer solves problem of the conventional 2-color multiplex CARS spectroscopy in which the wavelength decomposition of CARS signals, necessary for high spectral resolution, is not possible with broadband pump light causing the CARS spectrum distortion.
Abstract:
A fuel cell system includes a power unit that generates power using a fuel; a fuel storage unit that stores the fuel; a fuel supply device that conveys the fuel from the fuel storage unit to the power unit; and a control unit that controls the supply of the fuel and the generation of power. The fuel supply device includes a fuel supply control device that controls the supply of fuel according to a signal generated by the control unit. The control unit includes a fuel control unit that generates the signal according to the information of the fuel storage unit and the state information of the power unit.
Abstract:
The present invention relates to an imaging apparatus for infrared rays nonlinear molecular vibrational microscopy. The imaging apparatus comprises a pump beam source for generating an infrared pump beam; a probe beam source for generating a probe beam; a beam combiner which synchronizes temporally and overlaps spatially the pump beam and probe beam on the same axis; a scanner for two-dimensionally scanning the combined pump beam and probe beam; a first optical focusing system for focusing the scanned pump beam and probe beam on a local point of the sample; a first collecting optical system for collecting the beam of which phase is shifted by interaction with the sample and forming a parallel beam; a first dichroic beam splitter for removing the infrared pump beam out of the parallel beam and splitting the probe beam of which phase is shifted; a reference interferometer for splitting a part of the probe beam out of the beams scanned by the scanner and generating a reference probel beam; an interferometric beam combiner for combining the probe beam having the shifted phase and the reference probe beam; a photodetector for detecting an intensity of a molecular vibrational beam signal from the combined probe beam; and a data analyzer for acquiring the detected signals and extracting a spectrospcopic information corresponding to the strength of molecular vibrational coherence of the sample.
Abstract:
A fuel cell stack induces smooth current collection and liquid or gas flow without using a heavy bipolar plate. The fuel cell stack includes: a membrane and electrode assembly (MEA) in which an electrolyte membrane is disposed between a cathode electrode and an anode electrode; a current collector disposed in the MEA to form an electrical path with an adjacent MEA; and a non-conductive separation plate disposed between the MEA and the adjacent MEA, the non-conductive separation plate forming flow channels to supply a liquid or gas to the cathode electrode and the anode electrode. A fuel cell stack structure having the above structure is simple and lightweight as the MEA includes a thin and lightweight non-conductive polymer separation plate and a current collector to connect adjacent MEAs.
Abstract:
A fuel cell system and a method of operating the same, the fuel cell system comprising: a fuel cell including at least one unit cell; an switch having first and second ends connected to different type electrodes of the fuel cell; and a circuit unit to detect whether a load is applied to the fuel cell, to control the operation of the switch according to the detection, cycle the switch open and closed to short circuit the fuel cell, in order to prevent the fuel cell from overheating and to consume a residual fuel in the fuel cell. The fuel cell system may further include a converter, a secondary cell, a battery charger, and a switching unit between the load and the fuel cell.
Abstract:
A system and method for transmitting/receiving encryption information in a mobile broadcast system supporting broadcast service (BCAST) are provided. In the mobile broadcast system, a BCAST Subscription Management (BSM) manages subscriber information of a terminal, and transmits to a BCAST Service Distribution/Adaptation (BSD/A) a first delivery message including a Registration Key Material (RKM) provided for registration of the broadcast service of the terminal and including at least one service or content's identifier. The BSD/A transmits to the BSM a first delivery confirmation message including information indicating success/fail in receipt of the first delivery message, and transmits the RKM to the terminal.
Abstract:
Disclosed is an apparatus and a method for transmitting/receiving synchronization mode information in a wireless communication system. A transmission apparatus in a wireless communication system enables a preamble signal in a frequency domain to carry operation mode information. A reception apparatus in a wireless communication system detects operation mode information from a preamble signal in a frequency domain.
Abstract:
Disclosed is an apparatus and a method for transmitting/receiving synchronization mode information in a wireless communication system. A transmission apparatus in the wireless communication system includes a mode information creating unit for creating operation mode information based on a determined utilized bandwidth, and a preamble generating unit for outputting a frequency domain preamble signal including the created operation mode information. A reception apparatus includes a signal receiving unit for receiving a frequency domain preamble signal, a bandwidth determining unit for determining a utilized bandwidth, and a mode information detecting unit for detecting operation mode information from the frequency domain preamble signal according to the determined utilized bandwidth.
Abstract:
This invention relates to locally administrable, biodegradable and sustained-release pharmaceutical composition for periodontitis and process for preparation thereof, which can show continuous drug effect for a long time by controlling the release time and by making the drug remain in the periodontal pocket for a prolonged time. The composition is prepared by i) making a microsphere containing the physiologically active substance, ii) making the mixture of the microspheres and water-soluble polymer such as polysaccharides iii) making the mixture into the form of film or strip or/and iv) coating the film or strip with a cation aqueous solution such as calcium and barium. The present pharmaceutical composition can be easily administered using forceps, has minimized side effects and maximizes the effect by releasing the active substance at the minimum dose, and make the patients feel comfortable.