Electronics and Telecommunications Research Institute

Korea Kumho Petrochemical Co., Ltd.

Myongji University Industry and Academia Cooperation Foundation

Naieel Technology

Jae Woo Kim

Yoon Ho Song

Jin Woo Jeong

Jun Tae Kang

Kyoung Ho Row

Yong Hee Yun

Do Hyung Kim

Seong Jin Park

Ji Won Park

Seong Jun Bae

Jin Woo Park

Ho Wook Jang

Yun Jung Kim

Chang Joon Park

Ji Hyung Lee

Jin Seo Kim

Sang Kyun Kim

Wook Ho Son

Soon Young Kwon

Jae Hoon Kim

Song Woo Lee

Kyung Kyu Kang

In Su Jang

Dong Il Kim

Yong Soo Joo

Man Hee Lee

Ju Yeon You

Ick Jin An

Eun Kwang Park

Young Rok Lee

Yu Mi Kim

So Ra Park

Min Sik Shin

Ji Seung Kim

Tae Hyun Jung

A preparation process of 5-ethylidene-2-norbornene, including: introducing dicyclopentadiene into a dicyclopentadiene decomposition reactor to thermally decompose the dicyclopentadiene; introducing a product of the above step into a cyclopentadiene purification tower; introducing 1,3-butadiene, a solvent, and cyclopentadiene separated from the top of the cyclopentadiene purification tower into a Diels-Alder reactor to react the same; introducing a product of the immediate above step into a 1,3-butadiene removal tower to recover 1,3-butadiene from the top; introducing a mixture at the bottom of the 1,3-butadiene removal tower into a desolvation tower, and recycling a solvent and unreacted raw materials recovered from the top of the desolvation tower to the dicyclopentadiene decomposition reactor; introducing a mixture at the bottom of the desolvation tower into a 5-vinyl-2-norbornene separation tower to separate 5-vinyl-2-norbornene; and introducing the 5-vinyl-2-norbornene into an isomerization reactor to react the same.

Preparation process of 5-ethylidene-2-norbornene

A standalone precursor is for synthesizing nanomaterials such as boron nitride nanotubes. The standalone precursor includes a pillar. Pores and through-holes are defined in the pillar. Each of the through-holes extends continuously from a first opening on an outer surface of the standalone precursor to a second opening on the outer surface of the standalone precursor. The first opening is diametrically opposite to the second opening across the standalone precursor.

Standalone precursor for synthesizing nanomaterials and apparatus for synthesizing nanomaterials using the same

One aspect of the present disclosure provides a system for producing 1,3-butadiene, which includes: a first supply unit, by which a first feed including a butene raw material, oxygen and steam is supplied; a second supply unit, by which a second feed including a butene raw material and oxygen is supplied; and a reaction unit, which includes a catalyst fixed bed and in which an oxidative dehydrogenation reaction takes place, wherein the first supply unit is connected to a front end of the reaction unit, and the second supply unit is connected to an intermediate end of the reaction unit.

System for producing 1,3-butadiene and method of producing 1,3-butadiene using the system

Disclosed is an apparatus and method of segmenting an object. An object segmentation method according to the present disclosure includes: receiving an input image; receiving a user input indicating at least one piece of information on a foreground region and a background region included in the input image; generating at least one among a foreground pixel list and a background pixel list using the received user input; calculating Gaussian distribution of at least one pixel that makes up the input image using at least one among the generated foreground pixel list and background pixel list; and determining whether the at least one pixel is a foreground pixel or a background pixel using the calculated Gaussian distribution.

Object segmentation apparatus and method using Gaussian mixture model and total variation

According to an embodiment of the present invention, there are provided a catalytic body, a method of manufacturing the same, and a method of preparing 1,3-butadiene using the same. The catalytic body includes an inactive support; an intermediate layer disposed on a surface of the inactive support; and an active layer disposed on a surface of the intermediate layer, wherein the active layer includes catalyst powder and a binder.

Catalytic body coated with metal oxide, method of manufacturing the same, and method of preparing 1,3-butadiene using the same

An arbitrary viewpoint image generation method includes obtaining an original image set photographed by a plurality of cameras included in a camera array at each of at least one focal distance at a same time point; obtaining a multi-focus image set by generating a multi-focus image from the original image set for each of the at least one focal distance; and generating an arbitrary viewpoint image at a position where a viewpoint is to be moved from the multi-focus image set.

Apparatus and method for generating image of arbitrary viewpoint using camera array and multi-focus image

Provided herein is a field emission device. The field emission device includes a cathode which is connected to a negative power supply and emits electrons, an anode which is connected to a positive power supply and includes a target material receiving the electrons emitted from the cathode, and a ground electrode which is formed to face the anode and has an opening through which the electrons emitted from the cathode pass. The ground electrode is grounded so that when an arc discharge occurs due to high voltage operation of the anode, electric charge produced by the arc discharge is emitted to a ground.

Field emission device with ground electrode

An apparatus and method for editing three-dimensional (3D) building data. The apparatus for editing the 3D building data includes an input unit configured to obtain 3D scan data of a building, and a processor configured to divide the obtained 3D scan data of the building in units of construction components.

Apparatus and method for editing three-dimensional building data

One aspect of the present invention provides a method for preparing a ferrite metal oxide catalyst, comprising (a) preparing a precursor solution by dissolving a magnesium nitrate precursor and an iron nitrate precursor in a polar solvent, (b) forming a catalyst powder by spray-pyrolyzing the precursor solution into a reactor using a carrier gas, and (c) calcinating the catalyst powder in a reservoir after conveying the catalyst powder to the reservoir. The method may increase the activity and stability of a catalyst powder by additionally performing a step of calcinating the catalyst powder at a certain temperature for a certain period of time, and may increase the purity of the catalyst by reducing moisture and nitrate remaining in the catalyst. Also, when using the catalyst in an oxidative dehydrogenation of n-butene, the selectivity and purity of 1,3-butadiene may increase.

Method for preparing ferrite metal oxide catalyst

The present disclosure may provide a field emission device with an enhanced beam convergence. For this, the device may include a gate structure disposed between a cathode electrode and an anode electrode, wherein the gate structure includes a gate electrode and an atomic layer sheet disposed on the gate electrode, the gate electrode facing an emitter and having at least one aperture formed therein.

Field-emission device with improved beams-convergence

An apparatus and method for producing a makeup avatar is disclosed. The apparatus may include a spectrum information metadata generating unit to generate spectrum information metadata, based on skin spectrum information of a user and cosmetics spectrum information related to makeup, a makeup information generating unit to receive, from the user, a makeup avatar to which makeup is applied through a user terminal, and to generate makeup information of the makeup avatar, a control information determining unit to determine control information for controlling a makeup status of the makeup avatar, based on the makeup information and the spectrum information metadata, and a makeup avatar metadata generating unit to generate makeup avatar metadata, based on spectrum information metadata corresponding to the control information and the makeup information.

Apparatus and method for producing makeup avatar

Provided is a manufacturing method of a CNT emitter with density controlled CNT, comprising: (i) fabricating a CNT paste by dispersing a carbon nanotube (CNT) powder, two kinds or more of inorganic fillers which have a lower melting temperature than the CNT and different oxidation degrees of the CNT, and an organic binder in a solvent; (ii) coating the CNT paste on an electrode formed above a substrate; (iii) sintering the substrate coated with the CNT paste to selectively oxidize the CNT around one kind of inorganic filler among two kinds or more of the inorganic fillers; and (iv) treating the surface of the CNT paste so that the surface of the CNT paste is activated.

Manufacturing method of CNT emitter with density controlled carbon nanotube

The present disclosure relates to a stacked x-ray tube apparatus using a spacer, and more particularly, to a stacked x-ray tube apparatus using a spacer that makes it possible to reduce the size of an x-ray tube by forming a stacked structure, with electric insulation and predetermined gaps maintained for each electrode, by forming a stacked x-ray tube by inserting insulating spacers (for example, ceramic) between a exhausting port, a cathode, a gate, a focusing electrode, and an anode and bonding them with an adhesive substance, and then inserting a spacer between a field emitter on a cathode substrate and a gate hole connected with a gate electrode.

Stacked x-ray tube apparatus using spacer

The present disclosure relates to an electric field emission x-ray tube apparatus equipped with a built-in getter, and more particularly, to an electric field emission x-ray tube apparatus equipped with a built-in getter that makes it possible to reduce the size of an x-ray tube by forming a stacked structure, with electric insulation and predetermined gaps maintained for each electrode, by manufacturing an x-ray tube having a stacked structure by inserting insulating spacers (for example, ceramic) between an exhausting port, a cathode, a gate, a focusing electrode, and an anode and bonding them with an adhesive substance, and then inserting a spacer between a field emitter on a cathode substrate and a gate hole connected with a gate electrode.

Electric field emission x-ray tube apparatus equipped with a built-in getter

The present disclosure relates to a field emission X-ray tube apparatus for facilitating cathode replacement, and more particularly, to a field emission X-ray tube apparatus for facilitating cathode replacement in which gates and cathodes are easily arranged through a joining member and a rotation preventing guide when gates and insulating spacers are rotated and joined with the cathodes while the cathodes and respective gates maintain electrical insulation, thereby easily replacing the cathodes.

Growing community of inventors

Daejeon, South Korea

Jae Woo Kim