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마이크로 사이즈 인출구경을 이용한 고휘도 이온빔 인출 시스템 개발
김윤재,박동희,정형설,황용석 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
In order to develop a high brightness ion source using plasma, the ion beam extraction system with an aperture of 100μm in diameter has been designed and constructed. It is observed that over 500nA of He ion beam current can be extracted. With such an optimized condition, ~10³ A/cm²sr beam brightness can be measured by emittance scanner, which is believed to be a promising result for developing next generation FIB.
최재필,조형규,최현철,황용하 대한건축학회 2003 대한건축학회논문집 Vol.19 No.11
The purpose of the ERAM model proposed in this paper is to analyze the spatial importance immanent in the intrinsic structure of spaces. Use of the adjacency matrix representing the connection of spaces makes it possible to analyze the spatial structure itself. On the assumption that a large number of people move continually at random in the system, the ratio of elements in any row of the n-th power of the adjacency matrix means the ratio of people of all nodes in equilibrium. Mathematically, it is the ratio of eigenvector corresponding to the dominant (maximum) eigenvalue, Therefore it is the attribute immanent in the structure of spaces itself. Moreover, it is possible to consider the relative level of attraction of spaces and the relative flow from spaces to spaces only by putting the gravity on the adjacency matrix. The ERAM model brings forth the flexible result reflecting the relativity of spaces and flows.
서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)
김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2
Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.
Single image-based 3D scene estimation from semantic prior
Hyeong Jae Hwang,Sang Min Yoon IET 2015 Electronics letters Vol.51 No.22
<P>Reconstructing a three-dimensional (3D) structure from a single image sequence to provide relevant contextual information for better human visual perception is a fundamental problem in computer vision. A 3D scene estimation methodology from a segmented image sequence that is learned from semantic priors is proposed. In particular, semantic information including 3D geometric characteristics can very efficiently predict the 3D structure of the scene from a given semantic region. The approach, which utilises semantic priors to estimate a 3D scene, is very robust for direct 3D scene reconstruction from an ambiguous depth map. The efficiency and effectiveness of the proposed approach has been proven experimentally with a large database.</P>