• 한국안광학회지
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• 제19권4호
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• pp.527-532
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• 2014

목적: 착용안경의 광학중심점과 동공중심의 일치여부를 사진촬영방법으로 확인하였으며, 불일치에 의해 유발되는 프리즘 영향을 연구하였다. 방법: 안경착용자 74명(148안), 평균나이 $29.19{\pm}12.22$세(19~55세)를 대상으로 안경을 착용한 상태에서 카메라 플래시를 터트리면서 안면사진을 촬영하였다. 촬영된 사진으로 각막반사상과 안경렌즈 광학중심점의 일치, 수평 및 수직오차를 측정하였으며, 불일치 편차로부터 안경테에 따라 유발되는 프리즘을 산출하였다. 결과: 양안수평오차는 금속테가 $1.55{\pm}1.70mm$, clings type 플라스틱테가 $1.71{\pm}2.21mm$, 플라스틱테가 $1.15{\pm}1.38mm$이었다. 수평방향의 유발된 프리즘이 허용오차를 벗어난 비율이 23.0%였으며, BI 프리즘 17.6%, BO 프리즘 5.4%이었다. 양안수직오차는 금속테가 $3.93{\pm}1.91mm$, clings type 플라스틱테가 $5.79{\pm}1.93mm$, 플라스틱테가 $6.01{\pm}2.94mm$이었다. 수직방향의 유발된 프리즘이 허용오차를 벗어난 비율은 44.6%였으며, 안경렌즈의 굴절력을 기준으로 -0.25${\leq}-3.00$에서 12.2%, -3.00${\leq}-12.00$에서 32.4%가 허용오차범위를 벗어났다. 결론: 수평방향에서 유도된 프리즘은 BI 프리즘이 많았다. 양안수직오차는 플라스틱테의 안경이 금속테의 안경보다 크게 나타났으며, 교정 굴절력이 높은 안경일수록 유발된 프리즘이 더 컸다. 사진촬영 방법으로 동공의 위치와 광학중심점을 동시에 측정할 수 있으며, 착용안경에서 유발되는 프리즘을 직접 평가할 수 있었다.

• 기술표준
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• 통권115호
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• pp.4-7
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• 2011

• 기술표준
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• 통권114호
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• pp.4-7
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• 2011

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 추계 학술대회 논문집
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• pp.350-351
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• 2005

• 천문학회보
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• 제21권
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• pp.13.1-13.1
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• 1996

• 한국방재학회지
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• 제10권3호
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• pp.56-62
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• 2010

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 금형가공,미세가공,플라스틱가공 공동 심포지엄
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• pp.76-95
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• 2005

• 한국측량학회:학술대회논문집
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• 한국측량학회 2007년도 춘계학술발표회 논문집
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• pp.409-412
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• 2007

To minimize damages caused by landslides due to severe rain falls and storms during the rainy season every year, it is necessary to carry out research to monitor the symptoms of landslide in advance and prevent them. If proper actions ate taken in advance by monitoring the symptoms of landslide, personal and property damages caused by landslides can be prevented or minimized. This study tries to measure the movement of model slopes after causing displacement to each model slope using no prism Total Station and examine the applicability of Total Station by displacement through the analysis of the data.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2000년도 춘계 학술발표회 논문집 Proceedings of EESK Conference-Spring
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• pp.178-185
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• 2000

A set of tests were accomplished in order to get better insight of the basic material properties of masonry made of normal concrete brick and different type of mortar compositions. Three different types of test were performed. Masonry unit and prism were tested by compressive strength test, Masonry wallets were tested by compressive strength test. Masonry wallets were tested in diagonally under tension. A significant influence of different mortar compositions on compression strength of masonry prism was observed, The tests have shown that for diagonal compression three different mode of failure were possible : tension crack along the loaded diagonal sliding along a mortar joint and combined sliding and diagonal crack according to the adhesive strength of a mortar.

• 한국정밀공학회지
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• 제4권1호
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• pp.42-52
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• 1987

Experimental investigation on the characteristics of the air flow around a square prism located in a uniform flow with various angles of attack was carried out. Experimental results were obtained for the angle of attack from 0 .deg. to 45 .deg. and for Reynolds No. from $2.6{\times}^4$to $12.8^4$. Seperation and reattachment was occurred on the forward face (face AB). Reattachment phenomenon was not developed in the range of attack angle lower 13 .deg. . But, for the range, 13 .deg. .approx. 35 .deg. , the reattachment developed and its position was moved forward the angle of attack increases. Pressure distributions on the reattachment face has a maxium at the reattachment point and a minimum at the separation point. Pressurea on two back faces are nearly symmetric in spite of the changes of the angle of attack and are influenced by the turbulence in rearward flow field.