Abstract: The present disclosure provides a network monitoring system including a plurality of sensor devices which transmits data packets and a monitoring server which performs the transferable reinforcement learning on the data packets to establish a bandwidth allocation policy in which a quality of experience (QoE) satisfies a set reference QoE to allocate the bandwidth to the plurality of sensor devices.

Abstract: The present invention relates to a tablet comprising candesartan or candesartan cilexetil and amlodipine or its pharmaceutically acceptable salt as active ingredients, the tablet using a particular solubilizer in order to significantly improve the stability and dissolution properties of the active ingredients. In addition, the present invention relates to a method of preparing the tablet.

Abstract: Disclosed herein is a method of simultaneously removing sulfur and mercury from a hydrocarbon material, including: hydrotreating the hydrocarbon material containing sulfur and mercury in the presence of a catalyst including a metal supported with a carrier to convert sulfur into hydrogen sulfide, and adsorb mercury on a metal active site or a carrier of the catalyst in the form of mercury sulfide.

Abstract: Disclosed herein is a method of simultaneously removing sulfur and mercury from a hydrocarbon material, including: hydrotreating the hydrocarbon material containing sulfur and mercury in the presence of a catalyst including a metal supported with a carrier to convert sulfur into hydrogen sulfide, and adsorb mercury on a metal active site or a carrier of the catalyst in the form of mercury sulfide.

Abstract: A nonlinear optical device is provided. More specifically, a wavelength conversion device package with less optical loss stabilizes optical alignment under an external environmental change, for example, in a temperature variation by providing a temperature regulating block and a temperature sensor to an optical oscillator and a wavelength modulator and fixing a flexible optical transmitter to the optical oscillator and the wavelength modulator. The wavelength conversion device package includes an optical oscillator comprising a light source for emitting a light; a flexible optical transmitter for transferring the light emitted from the optical oscillator to a wavelength modulator; and the wavelength modulator for receiving the light from the optical transmitter and radiating a wavelength-modulated light.

Abstract: The present invention relates to a fabrication method for a quasi-phase-matched waveguide. The method includes the steps of forming a metal etch mask on a ferroelectric single crystal substrate, etching the substrate by using the etch mask, removing the etch mask, forming conductive layers on the etched substrate, forming polarization regions by applying an electric field to the conductive layers, and flattening the substrate after removing the conductive layers. Accordingly, the present invention is advantageous in that it can be applied to various fields employing a ferroelectric substrate, such as LiNbO3, LiTaO3, Mg:LiNbO3 or Zn:LiNbO3, it can obtain more accurate and uniform periodic domain inversion devices with a high quality and can fabricate devices that are cheaper and have a better performance.

Abstract: A nonlinear optical device is provided. More specifically, a wavelength conversion device package with less optical loss stabilizes optical alignment under an external environmental change, for example, in a temperature variation by providing a temperature regulating block and a temperature sensor to an optical oscillator and a wavelength modulator and fixing a flexible optical transmitter to the optical oscillator and the wavelength modulator. The wavelength conversion device package includes an optical oscillator comprising a light source for emitting a light; a flexible optical transmitter for transferring the light emitted from the optical oscillator to a wavelength modulator; and the wavelength modulator for receiving the light from the optical transmitter and radiating a wavelength-modulated light.

Abstract: An integrated optical modulator and method for manufacturing thereof are disclosed. The integrated optical modulator comprises a carrier wave band modulator using a double sideband modulation method and an intermediate frequency band modulator using a single sideband modulation method. The carrier wave band modulator and the intermediate frequency band modulator are connected in series. A method for manufacturing an integrated optical modulator comprises preparing a substrate having at least one polarization reversed section, forming a first optical waveguide part and a second optical waveguide part on the substrate, forming a buffer layer over the first and second optical waveguide parts, forming sequentially a first electrode part and a second electrode part over the first optical waveguide part, and forming a third electrode part over the second optical waveguide part.

Abstract: The present invention relates to a fabrication method for a quasi-phase-matched waveguide. The method includes the steps of forming a metal etch mask on a ferroelectric single crystal substrate, etching the substrate by using the etch mask, removing the etch mask, forming conductive layers on the etched substrate, forming polarization regions by applying an electric field to the conductive layers, and flattening the substrate after removing the conductive layers. Accordingly, the present invention is advantageous in that it can be applied to various fields employing a ferroelectric substrate, such as LiNbO3, LiTaO3, Mg:LiNbO3 or Zn:LiNbO3, it can obtain more accurate and uniform periodic domain inversion devices with a high quality and can fabricate devices that are cheaper and have a better performance.

Abstract: A symmetric optical modulator with low driving voltage, wherein polarization of any one of branched waveguides formed on a substrate is inverted, and the two branched waveguides are simultaneously controlled by a center electrode formed on a top portion thereof, thereby ensuring a low voltage driving and embodying a characteristic of there being no signal distortion due to chirp.

Abstract: A symmetric optical modulator with low driving voltage, wherein polarization of any one of branched waveguides formed on a substrate is inverted, and the two branched waveguides are simultaneously controlled by a center electrode formed on a top portion thereof, thereby ensuring a low voltage driving and embodying a characteristic of there being no signal distortion due to chirp.