• 대한화학회지
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• 제39권7호
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• pp.572-577
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• 1995

아세토니트릴 용매계에서 aryl 치환(Z)-benzoate류와 아민류의 반응속도를 15, 25, 및 35 $^{\circ}C$에서 분광학적 방법으로 구했다. 2차 반응속도 상수로부터 Hammett $\rho$값, Bronsted ${\beta}$값, 및 활성화 parameter를 구했으며 이들값과 M-O-F-J diagram 등의 해석으로부터 본 반응은 $S_AN$ 메카니즘으로 진행됨을 알 수 있었다.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVI)
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• pp.120-122
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• 2005

Phospholipases C (PLCs) from B. cereus 318 and recombinant Pichia pastoris were immobilized on sol-gel coated glass beads. The pH and temperature on immobilized PLC activity were investigated. Operational and storage stability of the immobilized PLCs was measured by spectro- photometric assay. The PLCs immobilized on sol-gel coated glass beads were photographed by scanning electron microscope (SEM).

• 대한전자공학회논문지
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• 제27권5호
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• pp.757-766
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• 1990

In this paper a new knowledge based vision system using orientation information on each surface of the 3-dimensional object is discussed. The measurement of the orientation information is performed by photometric stereo method. And then the obtained orientations are segmented using Gaussian curvature and mean curvature. A hierarchical knowledge base which is based on the characteristics, shape, area and length of the surface is built up, and then the knowledge based system infers by the condition interprete system (CIS). As the results, an easier and more accurate 3-D object recognition system is implemented, because it uses the characteristics and shapes as units of the surface in the recognition process.

• 천문학논총
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• 제14권1호
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• pp.9-22
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• 1999

Current searches for gravitational microlensing events are being carried out only by a photometric method. In this review paper, we demonstrate that the nature of Galactic lenses can be significantly better constrained with the additional astrometric observations of microlensng events. First, by astromerically observing lensing events, one can resolve the lens parameter degeneracy, and thus the lens mass can be determined with improved precision. Second, by being free from the blending problem, astrometric observations of lensing events will allow one to improve the uncertainties in the determined Einstein time scales. Third, the lens brightness, which could not be measured photometrically, can be measured from the astrometric observations of lensing events, and thus the nature of lens matter can be better constrained. Finally, with the help of astrometric followup observations of a binary-lens event, one can uniquely determine the solution of lens parameters, allowing one to obtain important astronomical information about the source star and the lens itself.

• 천문학회지
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• 제33권3호
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• pp.151-158
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• 2000

We conducted a deep CCD observations in V band to obtain stellar density distribution and to determine the distances toward two molecular clouds with anomalous velocity in the Galactic anti-center region. Star count method based on the linear programming technique was applied to the CCD photometric data. We found two prominent peaks at distances of around 1.4 and 2.7 kpc. It is found that the first peak coincides well with stellar density enhancement of B8-A0 stars and the second one with the outer Perseus arm. The effect of the choice of the luminosity function is discussed. The stellar number density distribution is used to derive the distances to the molecular clouds and the visual extinctions caused by the clouds. We found that two molecular clouds are located almost at the same distance of about 1.1 $\pm$ 0.1 kpc, and the peak extinctions caused by the clouds are about 2.2 $\pm$ 0.3 mag in V band.

• 천문학회지
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• 제26권2호
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• pp.141-152
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• 1993

The sample of sub dwarfs are selected from LHS catalogue on the bases of the reduced proper motion diagram utilizing Chui criteria, and confirmed with the available photometric and/or kinematic data. Among them, 20 sub dwarfs have trigonometric parallaxes with accuracy better than $20\%$. The color­absolute magnitude relation is derived with them. By adopting this color-magnitude relation and $V/V_m$ method, we have derived the sub dwarf luminosity function over the absolute magnitude range of $M_v$= 4.5 and 9.5. This halo luminosity function is consistent with that of Eggen(1987). By adopting the available mass-luminosity relations for halo stars, we have found that the halo IMF is steeper than disk IMFs of Scalo(1986) and Salpter(1955) in this small mass region.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2000년도 춘계학술대회 논문집
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• pp.123-124
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• 2000

오존($O_3$)은 이산화질소, 일산화탄소, 휘발성유기화합물 둥을 포함하는 다양한 물질과 광화학반응에 의하여 생성되는 2차적인 오염물질로 사람과 식물에 영향을 미치고 있는 중요한 오염물질로 알려지고 있으며, 국내에서는 이와 관련하여 오존예보제, 경보제 둥을 운영하여 오존에 의한 피해 영향을 줄이고자 노력하고 있다. 현재 오존을 측정할 수 있는 방법은 환경오염공정시험방법과 정부에서 운영하고 있는 대기오염 자동측정망의 오존 측정방법인 자외선광도법(Ultra Violate Photometric Method)으로 구분되어 지고 있으나, 자동측정장비는 매우 고가의 장비이며, 관리를 위하여 전문적인 지식이 요구되고 있고, 측정소의 개수가 매우 부족한 실정이기 때문에 대기중 오존농도의 지역적인 자료와, 실내공기 측정, 그리고 공간적인 분포 해석을 위해서는 다른 측정방법이 요구된다고 하겠다. (중략)

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2000년도 추계학술발표논문집
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• pp.224-227
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• 2000

본 논문에서는 기준 영상으로부터 면의 반사특성을 검출하고, 구해진 반사특성을 임의의 물체에 적용하여 3매의 명암영상을 얻는다. 이 영상을 측광입체시법(photometric stereo method)에 적용하여 3차원 형상인식하는 방법을 제시한다. 본 연구에서 목적으로 하는 물체의 반사특성은 난반사(diffuse reflection)성분과 전반사(specular reflection)성분이 혼합된 혼합 반사면(hybrid reflectance surface)을 그 대상으로 하며, 이러한 면의 반사특성은 Torrance-sparrow모델로 가정하여 문제를 해결해 나간다. 본 연구에서 목적으로 하는 대상 물체는 동일한 재질로 이루어졌다는 가정 하에서 몇개의 표본점들을 취해 반복수치 계산하기 때문에 계산속도가 빠르며, 각 표본점들로부터 계산된 면특성 파라메터들의 평균값을 취해서 다시 Torrance-sparrow모델에 적용함으로써 측광입체시법의 해석을 가능토록 한다. 즉, 3차원 형상인식 과정시 계산된 면특성 파라메터를 사용해 생성한 참조표와 명암영상과의 비교에 의해 빠른 면방향 복구를 행할 수 있다.

• 한국의류학회지
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• 제21권7호
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• pp.1227-1235
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• 1997

The purpose of this study was to classify the somatotype based on the side view and to analyze the characteristics of each somatotype. In order to reduce the burden of stocks and increase clothing fitness, systematic information on typical body sizes and somatotypes is essential. The subjects were 206 unmarried women aged from 19-29. Data were collected through anthropometry and photometry and analyzed by factor analysis, cluster analysis and analysis of variance. As the result of factor analysis for the classification of somatotypes, 8 factors which explain 74.7% of variance were extracted from 35 photometric and 17 anthrometric data. Using factor scores cluster analysis was carried out and the subjects were classified into 4 cluster.Each cluster was classified as bending type, swayback, turning over type and straight type accordding to its position to the relativeplumb line and their side view contour.

• 조명전기설비학회논문지
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• 제22권1호
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• pp.17-23
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• 2008

본 논문에서는 2분할 수광 방식의 측정시스템을 이용하여 수도권 일대의 도로의 조도와 휘도분포를 측정하여 국내 도로조명 실태를 파악함으로써 조명시설들의 특징에 대하여 분석했다. 측정결과 대다수의 도로가 도로의 형태, 조명기구의 점등방식, 도로주변의 가로수 혹은 장애물 등의 영향으로 도로조명 허용기준을 만족시키지 못하고 있었다.