• Journal of the Korean Chemical Society
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• v.11 no.4
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• pp.143-149
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• 1967

The Transient State Theory of Significant Liquid Structure is applied to a binary liquid solution of benzene and carbon tetrachloride, which gives slightly positive deviation from Raoults law. The partition function for the solution is derived according to the proposed theory. The various thermodynamic properties such as total and partial vapor pressures, molar volumes, entropies of mixing, and compressibilities are calculated at three different temperatures, 298.15^{\circ}K$, 313.15^{\circ}K$ and 343.1515^{\circ}K$. The calculated values agree satisfactorily with experimental data.

• Journal of the Korean Chemical Society
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• v.58 no.1
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• pp.62-67
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• 2014

In the present study a novel series of (2-substituted-4-methylthiazol-5-yl)(4-substituted piperazin-1-yl)methanone derivatives were synthesized by reaction of 2-substituted-4-methylthiazole-5-carboxylic acid with N-substituted benzyl piperazine by using 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide hydrochloride (EDCl) and 1-hydroxybenzotriazole (HOBt) in DMF. All the newly synthesized compounds were characterized by spectral methods. The title compounds were screened for in vitro antibacterial activity. Most of the compounds show moderate to good antimicrobial activity.

• Communications of the Korean Mathematical Society
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• v.38 no.4
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• pp.1163-1173
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• 2023

In this paper, we prove the Hyers-Ulam stability and Mittag-Leffler-Hyers-Ulam stability of a differential equation of Logistic growth in a population by applying Laplace transforms method.

• Korean journal of food and cookery science
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• v.27 no.3
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• pp.95-104
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• 2011

This study was conducted to investigate the effect of red wine on the quality properties and sensory score of seasoned pork meat. Pork meat was treated with 25% water (control), 20% water and 5% red wine (RW5), 15% water and 10% red wine (RW10), or 10% water and 15% red wine (RW15). The moisture, crude protein, crude fat, $L^*$ value, springiness, cohesiveness, gumminess, chewiness, and VBN content were not significantly different among the samples. Cooking yield, moisture retention, and fat retention were significantly higher in the RW5, RW10, and RW15 (p < 0.05) compared to those in the control. The $a^*$ value of RW5 was the highest among the samples, and the $b^*$ value increased significantly in the control and RW5 (p < 0.05). The hardness of the control was the highest among all samples (p < 0.05). The pH was significantly lower in RW5, RW10 and RW15 (p < 0.05) compared to that in the control. The TBARS value and total bacteria were significantly lower in RW5, RW10, and RW15 (p < 0.05) compared to those in the control. Adding red wine altered the fatty acid and free amino acid of cooked seasoned pork. These results suggest the possibility that red wine could be used an additive to improve the quality of cooked seasoned pork.

• Journal of Digital Convergence
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• v.18 no.3
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• pp.349-355
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• 2020

The Fourth Industrial Revolution has emerged, and technologies of various industries are being converged, compounded, or clouded computing, mobile, or big data. The emergence of a variety of skills and new jobs to match them is bringing the public out of the education and occupation of traditional metal crafts. In this change, craft education should find and study the education method suitable for the present times, and apply it to the educational field to raise public interest and revival. To this end, we will investigate the cases of education in other industries where new materials or technologies have been introduced, and use them in education of traditional metal craft techniques. In addition, we will investigate various cases and features of 3D printing technology and use it for education in craft techniques that have limited time, space and resources.

• The Korean Journal of Emergency Medical Services
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• v.11 no.2
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• pp.29-50
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• 2007

Purpose: This study was carried out in order to provide the basic data for the curriculum standardization of emergency medical technology by analyzing the three-year period curriculum of 9 colleges. Method: This is the descriptive analysis of the curricular of 9 colleges. The analyzed variables were the distribution, credit, mean, frequency of the liberal arts, majors, clinical and on-the-job(OJT) training courses, and teaching profession subject. Results: 1. The number of whole subjects was 61.0, the number of liberal arts was 10.3, and the number of majors was 50.7. The completion credit was 128.3, credits of liberal arts were 15.5(12.2%), and credits of majors were 112.8(87.8%). 2. The range of credits of liberal arts was 8 to 21, and most of the liberal arts were done in the first year of college. 3. The distribution of the credits of the national examination for the license was as follows; the itemized emergency care subjects were 27.9 credits, the general emergency care was 18.5 credits, basic sciences were 17.7 credits, emergency patient care was 9.5 credits, and emergency medicine law was 3.2 credits. 4. The number of other major subjects were 10.0 and showed even distribution in each semester. 5. The clinical and on-the-job(OJT) training were 4.5 subjects, the credits of completion were 14.9 and these subjects were not in the first year of college. Conclusion: This results will be helpful data for the advanced development and standardization of the new curriculum by keeping pace with the environmental change, competency improvement and the need of the learners of emergency medical technology.

• Journal of the Korean Graphic Arts Communication Society
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• v.28 no.2
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• pp.13-30
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• 2010

Existing domestic ink market had some problem because of dependence on CPP import, increasing cost, competitive price. For this reason, previous speed of research and developments are very slow. Therefore, develop the new waterborne type of non-chlorine resin, enhance the nation's position with manufacturing outstanding products. Through this thesis, the purpose is mix the polar resin and non-chlorine resin with many proportion and manufacturing better product than existing resin. Pilot production samples have run the test of adhesion, transparency, water resist and resist high pressure car washing. In conclusion, this thesis found that mix acryl Urethane resin and Non-Chlorine resin is the optimum condition.

• Journal of the Korean Graphic Arts Communication Society
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• v.30 no.2
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• pp.23-33
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• 2012

With the development of many display technologies currently applied to them in the field of printed electronics, there have been many researches that high resolution printing for thin and uniform pattern. In this paper, printing ink flow properties in the reverse offset mechanism were simulated. The aim of this research is to expect the ink flow behavior between cliches to make fine pattern by a printing technique which is a reverse offset. The simulation results show that almost the same as the experiments and the flow behavior according to the ink film thickness and printing pressure changes could be expected.

• Journal of the Korea Furniture Society
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• v.20 no.5
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• pp.414-430
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• 2009

This paper is designed for the purpose of suggesting Figurative data applicable to modern furniture designs through doing research on Haejuban's engraving that includes excellent Figurative beauty among Korean traditional lighted-floor type furnitures. As a result of the analysis, Haejuban's(Traditional Korean dining table) engraving pattern type was mainly divided into independent patterns and combined patterns. The patterns expressed the most among them are peony patterns. The patterns expressed by the engraving mostly showed the Figurative characteristics of symmetry. The patterns shown in Haejuban's engraving wish or stand for richness, long life, lucky, fidelity, divinity, happiness, success and so on. The species of trees used for Haejuban were a total of 8 kinds such as ginkgo trees, zelkova trees, walnut trees, wild-walnut trees, chinaberry trees and other scrub trees. Ginkgo trees were used the most among them.

• Proceedings of the Korea Society of Design Studies Conference
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• 2002.05b
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• pp.118-119
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• 2002