• Bulletin of the Korean Mathematical Society
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• v.61 no.1
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• pp.263-271
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• 2024

A vertex coloring of a graph G is called injective if any two vertices with a common neighbor receive distinct colors. A graph G is injectively k-choosable if any list L of admissible colors on V (G) of size k allows an injective coloring 𝜑 such that 𝜑(v) ∈ L(v) whenever v ∈ V (G). The least k for which G is injectively k-choosable is denoted by χ^l_i(G). For a planar graph G, Bu et al. proved that χ^l_i(G) ≤ ∆ + 6 if girth g ≥ 5 and maximum degree ∆(G) ≥ 8. In this paper, we improve this result by showing that χ^l_i(G) ≤ ∆ + 6 for g ≥ 5 and arbitrary ∆(G).

• Journal of applied mathematics & informatics
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• v.42 no.2
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• pp.353-366
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• 2024

A total coloring of a graph G is an assignment of colors to both the vertices and edges of G, such that no two adjacent or incident vertices and edges of G are assigned the same colors. In this paper, we have discussed the total coloring of M(T_n), M(D_n), M(DT_n), M(AT_n), M(DA(T_n)), M(Q_n), M(AQ_n) and also obtained the total chromatic number of M(T_n), M(D_n), M(DT_n), M(AT_n), M(DA(T_n)), M(Q_n), M(AQ_n).

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.20 no.1
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• pp.53-56
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• 2007

We have fabricated organic white light emitting diodes by mixing two colors from very thin rubrene doped and non-doped DPVBi layers. The device structure was ITO/2-TNATA(15 nm)/${\alpha}$-NPD(35 nm)/DPVBi:rubrene(5 nm)/DPVBi(30 nm)/$Alq_{3}(5\;nm)$/BCP(5 nm)/LiF(0.5 nm)/Al(150 nm). The yellow-emitting rubrene of 0.7 wt % was doped into the blue-emitting DPVBi host for the white light. CIE coordinate of the device was (0.31, 0.33) at 8 V. The color coordinates were stable at wide ranges of driving voltages. The luminance was over $1,000\;cd/m^{2}$ at 8 V and increases to $14,500\;cd/m^{2}$ at 12 V. The maximum current efficiency of the device was 8.2 cd/A at $200\;cd/m^{2}$.

• Fashion & Textile Research Journal
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• v.12 no.6
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• pp.796-811
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• 2010

Research materials of Korean traditional shoes have so far been mainly literary explanations or plane pictures expressed on the basis of the explanations and photographs of incomplete forms of relics excavated and it makes us have difficulty in observing them visually and producing products with them by design application. This project is to establish database of literal data of Korean traditional shoes and visual data using 3D in order to make the foundation of developing culture industry contents using Korean traditional shoes. According to the initial research plan. first. it analyzed and arranged the Korean traditional shoes into period. sex and function as the research goals of the first year. categorized the form. composition. materials. patterns. and colors of traditional shoes and then database of the materials was performed with text. Second. visual image materials including forms. composition. materials. patterns. and colors of traditional shoes were established as database with scanner. digital camera and computer 2D. Results of such a database will be able to be used as important materials which can be the foundation of culture industry contents development of traditional shoes and be the materials for developing digital culture contents of traditional shoes and teaching Korean traditional culture.

• Journal of Broadcast Engineering
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• v.14 no.4
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• pp.397-408
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• 2009

In this paper, we present a non-static color histogram method to retrieve clothing images that are similar to a query clothing. Given clothing area, our method automatically extracts major colors by using the octree-based quantization approach[16]. Then, a color palette that is composed of the major colors is generated. The feature of each clothing, which can be either a query or a database clothing image, is represented as a color histogram based on its color palette. We define the match color bins between two possibly different color palettes, and unify the color palettes by merging or deleting some color bins if necessary. The similarity between two histograms is measured by using the weighted Euclidean distance between the match color bins, where the weight is derived from the frequency of each bin. We compare our method with previous histogram matching methods through experiments. Compared to HSV cumulative histogram-based approach, our method improves the retrieval precision by 13.7 % with less number of color bins.

• Journal of the Korean Society of Costume
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• v.49
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• pp.137-154
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• 1999

This study was designed to unify two types -traditional and western- of wedding dress in one and to develop new wedding dress which can be used to wedding ceremony as well as Pae-Bae(Greeting) as an alternative for the modernistic utilization of traditional wedding dress. The wedding dress for a bride and bridegroom was developed to be used not only for wedding ceremony but also for engagement. The children's dress which can be worn for carrying flowers in front of a bride and a bridegroom was also developed. All six dresses two of each for a bride and a bridegroom one of each for a body and a girl were developed from the review of literature and photos to be introduced traditional wedding dress. The results were as follows: 1. The Korean characteristics in the developed dress were expressed well in the curves straight lines oblique lines and cracks. 2. The traditional symbolic meanings were expressed by using the pattern which was on traditional wedding dress. Changes from five original colors -red, blue, yellow, white, black- to pastel colors also could modernize the dress. 3. The Korean characteristics could be effectively expressed in dying techniques and piling -up by using hand-made silk and No-Bang, 4. The children's dress for a ceremony was re-established to modernized design with traditional beauty. 5. The expenses could be saved practically because the dress was developed for wedding ceremony as well as for engagement.

• Fashion & Textile Research Journal
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• v.14 no.3
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• pp.347-362
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• 2012

The analysis results of the characteristics of children's clothes for school girls from the 2006S/S-2010S/S collections reveal that the most frequent type of item composition was 2'PS & 3'PS. T-shirts were the popular kind of item for upper garments and pants for lower garments. The major silhouettes were H and A line. The predominant neckline was U, which was followed by camisole and V. The major collar styles were stand-up and flat. Chromatic colors were used more than achromatic ones and after white the most popular colors were blue, pink, red, black, navy, and green. The dominant color scheme was a two-color or three-color scheme. The percentage of solid and patterned material garments was the highest and the most popular pattern was flowers. The most popular style of garment had no decorative detail that was followed by one-item, two-item, and three-item decoration. The major kinds of decorative detail were frills, pleats, and prints.

• The Bulletin of The Korean Astronomical Society
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• v.35 no.2
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• pp.27.1-27.1
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• 2010

Globular cluster (GC) systems in most galaxies, particularly in ellipticals, show bimodal color distributions. Because broadband colors trace metallicity at old ages, this phenomenon has been commonly interpreted as bimodal metallicity distributions, implying the presence of two sub-populations in the globular cluster system within a galaxy. However, a new explanation has recently been proposed, in which the non-linear nature of color-metallicity relations induced by horizontal-branch stars can produce bimodal color distributions even from unimodal metallicity distributions. In this study, we put these two explanations to the test on the origin of color bimodality, using multi-band (U,B,V and I) photometry of globular clusters in NGC 1399, the central giant elliptical galaxy in Fornax galaxy cluster. We find significant changes in the morphology of color distributions when using different colors. The observation is also well reproduced by the Monte Carlo realization of GC color when a unimodal metallicity distribution and the theoretical non-linear color-metallicity relations are assumed. We discuss the implications regarding theories on galaxy formation and evolution.

• Journal of Fashion Business
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• v.17 no.5
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• pp.45-56
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• 2013

This study researches functional arrangements for colors of work clothes - concentrating on the arrangements of lightness - for safety protection of workers at the job sites in the mechanical industry. To conduct such study, blue color (5PB) is selected for the CAD simulations on six arrangements of brightness based on two colors. The brightness ranges are of 5PB color (between 3~7.5) which are measurable by Munsell Conversion, and arrangements on lightness consisting of one arrangement of high lightness-gap, two of medium lightness-gap, and three of low lightness-gap. To analyze the data of color values after applying arrangements of lightness and to evaluate the levels of awareness regarding arrangements, the NCS colorimetric is being applied. Color palettes are based on the NCS notations, and then marked with color triangles. After evaluation, the visibility proves to be high when the arrangements contain high lightness at the top and bottom, and the arrangements with higher lightness-gap show higher effects in safety. Since this study tends to check factors of lightness, the other color factors were limited. Therefore, in order to apply these results at the job sites, integrated applications of such results will be very useful for developing safe working clothes in the future.

• Journal of the Korean housing association
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• v.26 no.3
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• pp.77-84
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• 2015

The purpose of this study is to analyze the aesthetic factors in color combinations of house exteriors in hillside villages, Busan. The so-called 'Hillside renaissance' is a representative urban regeneration project in Busan. The towns in hillside area in Busan have developed colorful sceneries. But all the colorful sceneries are not the same. Each town has own color characters and different aesthetic color effects. This study is to determine the unique aesthetic components in color combination of Gamcheon and Daecheong. This study is based on the traditional color harmony theories. The analysis focuses, inter alia, on Moon-Spencer's 'Aesthetic Measure'. A house exterior color has relations with two neighboring colors in array. And those three colors with next two houses have again each three hue, value and chroma relations. This analysis is first to determine whether each sample color combination is harmonized, and if harmonized, next step to list which aesthetic factor is dominantly contributing to color harmony. And at last, to study the subcategorized sectors of each color components of the hue, value and chroma.