• 천문학논총
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• 제27권4호
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• pp.263-264
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• 2012

We present the properties of dust and the near-infrared spectral features in nearby early-type galaxies. The properties of dust are obtained from the AKARI far-infrared all-sky survey diffuse map. The AKARI/IRC is used for the near-infrared spectra. We improve spectral data with the new dark subtraction method on the basis of the knowledge acquired in our laboratory experiments of the engineering-model detector for the IRC. We have succeeded in fitting the continuum by a power-law function and detecting CO and SiO absorption features in early-type galaxy spectra. Comparing the properties of dust and near-infrared spectral features, we find that the power-law slope depends on dust temperature, but not on the dust mass, which suggests that low-luminosity AGNs may contribute to the changes in the power-law slope and dust temperature.

• 천문학회보
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• 제42권2호
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• pp.41.1-41.1
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• 2017

We present weak-lensing analysis of the merging galaxy cluster Abell 115 at z=0.197 based on Subaru i and V band images. As merging clusters often show, Abell 115's merging signatures include radio relics, double X-ray peaks, and large offsets between the cluster member galaxies and the X-ray distributions. A weak-lensing study provides underlying dark matter distribution, the key information to determine the complex merging scenario of the cluster. In this work, we present 2D mass reconstruction of the cluster, which reveals two distinct mass peaks consistent with galaxy distributions. We measure the first weak-lensing mass of each subcluster. Our weak-lensing total mass estimate is a few factors lower than the published dynamical mass obtained from velocity dispersion. This large mass discrepancy may be attributed to a significant departure from dynamical equilibrium. We also re-analyze the archival chandra data and find that the result is consistent with weak-lensing mass.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.187-190
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• 2007

The Geostationary Ocean Color Imager (GOCI) is under development to provide a monitoring of ocean-color around the Korean Peninsula from geostationary platforms. It is planned to be loaded on Communication, Ocean, and Meteorological Satellite (COMS) of Korea. The GOCI has been designed to provide multi-spectral data to detect, monitor, quantify, and predict short term changes of coastal ocean environment for marine science research and application purpose. The target area of GOCI observation covers sea area around the Korean Peninsula. Based on the nonlinear radiometric model, the GOCI calibration method has been derived. The nonlinear radiometric model for GOCI will be validated through ground test. The GOCI radiometric calibration is based on on-board calibration devices; solar diffuser, DAMD (Diffuser Aging Monitoring Device). In this paper, the GOCI radiometric error propagation is analyzed. The radiometric model error due to the dark current nonlinearity is analyzed as a systematic error. Also the offset correction error due to gain/offset instability is considered. The radiometric accuracy depends mainly on the ground characterization accuracies of solar diffuser and DAMD.

• 천문학회지
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• 제37권4호
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• pp.185-191
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• 2004

We have been developing a solar observing system based on a fast CCD camera 1M30P made by the DALSA company. Here we examine and present the characteristics and performance of the camera. For this we have analyzed a number of images of a flat wall illuminated by a constant light source. As a result we found that in the default operating mode 1) the mean bias level is 49 ADU/pix, 2) the mean dark current is about 8 ADU /s/pix, 3) the readout noise is 1.3 ADU, and 4) the gain is about 42 electrons/ ADU. The CCD detector is found to have a linearity with a deviation smaller than $6\%$, and a uniform sensitivity better than $1\%$. These parameters will be used as basic inputs in the analysis of data to be taken by the camera.

• 한국광학회지
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• 제10권3호
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• pp.214-220
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• 1999

광자감쇠 분광신호에 실린 오차와 감쇠시간 편차와의 관계를 이론적으로 계산하였고 shot noise와 디지털오차에 의한 감쇠시간 편차로부터 측정 가능한 흡수율의 한계를 계산하였다. 광자감쇠 공동의 정렬과 관련된 오차와 공동 내부의 기체 압력에 따른 감쇠시간 변화 그리고 거울에서의 간섭에 의한 감쇠시간의 변화를 규명하였다.

• 패션비즈니스
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• 제23권6호
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• pp.64-75
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• 2019

This study analyzed the clothing color preferences of elementary students and the colors of clothes actually worn at school in terms of hue and tone. The sample consisted of 385 students enrolled at a public elementary school in Seoul. In this study, 120 color cards were used to guide the hue and tone. Descriptive statistics and chi-square analysis were used to analyze the data. The results were as follows. First, the most preferred clothing colors were achromatic, purple blue, red, and blue, while the most preferred tones were vivid, and pale. Second, the largest percentage of top colors worn at school were achromatic and vivid tones, while the largest percentage of bottom colors at school were achromatic and dark tones. Third, elementary boys preferred vivid and strong tones, while girls preferred pale and vivid tones. Fourth, students at higher grades preferred deeper and darker tones compared with students in lower grades.

• 식물병연구
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• 제28권2호
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• pp.57-60
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• 2022

Leaves of Chionanthus retusus were found to be damaged by leaf spot disease associated with a fungus in Iksan, Korea. Leaf spots were angular to irregular, vein-limited, scattered, 1-8 mm diameter, brownish-gray to dark brown when dry, with heavy fructification. The pathogen causes premature defoliation of C. retusus plant and was identified as Pseudocercospora chionanthi-retusi based on morphological and molecular-phylogenetic analyses. The phylogenetic tree was constructed using multi-locus DNA sequence data of partial actin (actA), partial translation elongation factor 1-alfa (tef1), partial DNA-directed RNA polymerase II second largest subunit (rpb2) genes, and internal transcribed spacer regions. Current study provides detail morphological description of P. chionanthi-retusi on C. retusus in Korea, with supports of phylogenetic analysis and pathogenicity test.

• 한국균학회지
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• 제50권2호
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• pp.131-136
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• 2022

Cornus officinalis plants that grow in several locations in Korea have been found to be infected with leaf spot disease. Symptoms include necrotic lesions, which are angular, irregularly shaped, vein-limited, and dark brown, on both sides of the leaves. The causal agent of the disease was identified to be Pseudocercospora cornicola based on the morphological characteristics of the fungus and molecular phylogenetic analysis of the obtained multi-locus DNA sequence data. This is the first report investigating P. cornicola found on C. officinalis in Korea.

• 대한가정학회지
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• 제37권12호
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• pp.1-11
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• 1999

The purpose of this study is to investigate the color preference of women living in Seoul, to provide materials which is useful for setting up the color plan for a better costume, and to suggest new information in the apparel study. This study is done on the basis of color preference only by age and the range of this study restricted on womens' clothes. The subjects of this research are 1,100 young adult women and 1,244 elderly women photographed in the street. The data are analyzed by frequency and percentage. The results of this study are as follows ; The preference of chromatic color and achromatic color, tint and tone, pattern of textiles are different mainly by age. 1. Elderly women prefer achromatic colors to chromatic colors. The most preferred achromatic color is black, especially elderly women prefer black. 2. Analysis of tint shows that blue, red and yellow red are commonly preferred by women. Especially blue is preferred by young women : red and yellow red are preferred by elderly women. 3. Analysis of tone shows that vivid, pale, dark tones are commonly preferred by women. Especially vivid tone is preferred by elderly women, while pale tone is preferred by young women 4. Analysis of pattern of textiles shows at, pattern textiles are preferred by elderly women rather than by young women. The most preferred pattern for elderly women is a flower pattern, and for young women a stripe pattern.

• 복식
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• 제61권10호
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• pp.32-41
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• 2011

The purpose of this study is to prove an importance of systemic analysis paradigm to interpret fashion make-up. This research employed 'paradigm for interpretation of fashion make-up signs' theory to analyze data. This theory consists of three steps to interpret the meaning of a work: (1) recognition of form, (2) analysis of connotation meanings, and (3) analysis of symbolic meanings and communication. The results of this study were as follows. Jean Paul Gaultier's eye make-up uses a square pattern that mostly consists of the color black. He presents a Glam Rock image by using rimmed make-up that portrays an avant-garde and a nonmainstream culture. Jean Paul Gaultier's make-up was showing black color and square eye pattern and was presenting Glam Rock image and was a rimmed make-up meaning a nonmainstream culture and Avant-garde symbolically. Chanel's make-up emphasizes the eyehole with the rimmed technique by applying the make-up of Marchesa Casati and including non-popularity, Limited Marketing symbolically. Christian Dior's make-up applies the representative make-up of Joan of Arc and Siouxsie sioux and also uses rimmed make-up to portray the meaning of religion persecution, the dark-ages militarism and including Humanism symbolically.