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공동주택 지하구조물 누수에 대한 인식과 누수발생에 따른 피해 분석: 설문조사를 중심으로
안기원 ( An Ki Won ),주희정 ( Ju Hee Jung ),오상근 ( Oh Sang Keun ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
There are many cases where large areas of the underground parking lots of residential buildings do not have proper measures against prevention of leakage, resulting in condensation, growth of infectious microogranisms and increase of pollution in the air. This paper discusses a study conducted to understand the awareness of leakage problems and the damage that follows in the underground structures of residential buildings.
수치화상처리기법을 이용한 지상사진의 정사투영화상의 작성
안기원,Ahn, Ki Won 대한토목학회 1993 대한토목학회논문집 Vol.13 No.5
스캐닝된 지상사진의 수치화상데이타를 이용하여 정사투영화상을 작성하는 기법을 제시하였다. 수치화상데이타를 얻기 위하여 촬영된 지상사진을 CCD 카메라 스캐너로 스캐닝한 후, 4차 다항식을 적용하여 스캐닝과정에서 생긴 기하왜곡을 보정하였다. 좌우 화상에 있어서 각 화소의 동일점을 찾기 위하여 자동매칭기법을 적용하였으며 외부표정요소를 이용한 공간교차이론으로 각 화소의 3차원 지상좌표를 구하였다. 얻어진 3차원 지상좌표와 우측화상데이타값으로부터, 거리의 역에 따른 가중평균법을 사용하여 1개 화소의 크기가 $1mm{\times}1mm$ 되는 정사투영화상을 작성하였다. 검사점에 대하여, 작성된 정사투영화상상의 X 및 Y좌표와 지상관측된 좌표를 비교하여 정사투영화상 작성기법의 유효성을 검증할 수 있었다. Investigation is given to the detailed procedure of a computer assisted automatic technique for ortho-image generation from digital stereo image data of close-range photographs scanned by the CCD camera scanner. After rectification of geometric scanning errors, the bundle adjustment technique was used to determine the exterior orientation parameters of terrestrial camera. An automatic correlation matching technique was applied to search for the conjugate pixels in digital stereo pairs. And the 3-dimensional coordinates of the corresponding pixels were calculated by the space intersection method. For the generation of ortho-image from the calculated coordinates and right image data values, inverse-weighted-distance average method was used. And the accuracy of the resulting ortho-image was checked by comparing its image coordinates with there corresponding ground coordinates for the check points.
안기원(Ki-Won Ahn),황원걸(Won-Gul Hwang) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The handling characteristics of a medium bus during a single lane change manoeuvre are investigated through computer simulation using DADS.<br/> Dynamic full model of the vehicle is established using tires, shock absorbers, leaf springs, sprung mass, and unsprung masses. A driver is assumed to steer the vehicle along a prescribed path which was obtained from field tests. He was modeled as PID controller in the simulation. The factors influencing the handling charateristics of the vehicle are studied.<br/>