• Journal of the Korean Graphic Arts Communication Society
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• v.29 no.1
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• pp.1-21
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• 2011

Because of high demand of color quality of the prints, proof prints are more important for end-user to predict and correct the final prints directly as an intermediate. Thus, proof prints can be used as a reference to take minimum ${\Delta}E^*ab$between the originals and finals in the field. The advantage of proof prints is to predict and correct color easily through the RIP(Raster Image Processor) without printing plates and plate making steps. While, it is thought that the proof systems are almost equivalent to the press in the past, present proof systems are more simple to take proof prints more easily due to the automation and digitalization. This paper addresses a method to perform an accurate profiling according to proof paper types and find optimal proof papers which meet proofing requirement. Although proof papers are matched with ISO 12647-7, we were trying to reduce ${\Delta}E^*ab$, In addition to the above, through the Gamut Mapping and Iteration, We were trying to find optimal proofing conditions.

• Journal of Digital Convergence
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• v.19 no.12
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• pp.103-113
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• 2021

In this study, the Q method is used to investigate the types of perceptions of liberal arts education perceived by college students and to investigate the characteristics of each type. 33 Q samples were extracted from the Q population collected through literature research, open questionnaires, and deep interviews. Q classification was conducted for 27 students of A University located in B City. The data was analyzed using the QUANL program. In the research, the types of awareness of liberal arts education were derived as "pursuit of various experiences", "pursuit of practical studies", "pursuit of accident expansion", and "pursuit of social change". The results of this study re-establish the meaning of liberal arts education in university education and suggest that it is necessary to consider various educational contents and teaching learning methods.

• Korean Journal of Mathematics
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• v.28 no.3
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• pp.613-621
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• 2020

In this paper, we investigate the general solution and the Hyers-Ulam stability of n-variable additive functional equation of the form $${\Im}\(\sum\limits_{i=1}^{n}(-1)^{i+1}x_i\)=\sum\limits_{i=1}^{n}(-1)^{i+1}{\Im}(x_i)$$, where n is a positive integer with n ≥ 2, in Banach spaces by using the direct method.

• Journal of the Korean Chemical Society
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• v.9 no.1
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• pp.29-32
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• 1965

A new conventional method for the preparation of 5-iodo-, chloro-and bromouracil by Sandmeyer reaction was described. According to this procedure, 5-halouracils have been prepared in high yields(up to 75%) without any difficulties to remove of impurities. No appreciable competing reaction was observed.

• Journal of the Korean Chemical Society
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• v.15 no.6
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• pp.285-293
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• 1971

The statistical thermodynamical properties of heavy water are calculated according to the transient state theory of significant liquid structure. The calculated values are shown to be in good agreement with the observed ones. The grand canonical ensemble partition function for the adsorbed phase of heavy water on graphite surface is derived using the theory. The adsorption isotherm, the surface pressure, the molar entropy and the molar internal energy for the adsorbed phase and then the molar heat of adsorption are calculated according to the derived partition function. The thermodynamic properties of the adsorbed water are also calculated and the results are compared with those of heavy water and discussed in view of the experimentally observed phenomena.

• Journal of Information Processing Systems
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• v.16 no.5
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• pp.1169-1182
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• 2020

The ant colony optimization (ACO) algorithm is a classical metaheuristic optimization algorithm. However, the conventional ACO was liable to trap in the local minimum and has an inherent slow rate of convergence. In this work, we propose a novel combinatorial ACO algorithm (CG-ACO) to alleviate these limitations. The genetic algorithm and the cloud model were embedded into the ACO to find better initial solutions and the optimal parameters. In the experiment section, we compared CG-ACO with the state-of-the-art methods and discussed the parameter stability of CG-ACO. The experiment results showed that the CG-ACO achieved better performance than ACO_R, simple genetic algorithm (SGA), CQPSO and CAFSA and was more likely to reach the global optimal solution.

• Journal of the Korean Chemical Society
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• v.19 no.1
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• pp.34-37
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• 1975

3-Hydroxy-canthaxanthin, reddish purple needle shaped crystals, has been isolated from the abdominal skin of Bombina Orientalis. Its structure has been established by visible and IR spectral characteristics, chromatographic behaviors, and physical and chemical properties.

• Journal of the Korean Chemical Society
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• v.14 no.1
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• pp.133-136
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• 1970

The quadratic and cubic force constants of hydrogen molecule are calculated by use of the one center function of Bishop. The master formula on which the computation is based was suggested by the previous work of one of the present authors. The results are in good agreement with the experimental values.

• Journal of the Korean Chemical Society
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• v.14 no.1
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• pp.61-64
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• 1970

3-Phenyl-5-trichloromethyl-2-pyrazoline was synthesized from the reaction of trichloroethylideneacetophenone with hydrazine hydrate. Pyridazinone derivatives were synthesized from the reaction of trichloroethylideneacetophenone with phenylhydrazine or substituted phenylhydrazines.

• Journal of the Korean Chemical Society
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• v.9 no.2
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• pp.75-77
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• 1965

A new method of synthesis of isobarbituric acid is described. With this method, isobarbituric acid can be synthesized both directly and conveniently. Yields of isobarbituric acid are up to 75 per cent.