• Journal of the Korean Graphic Arts Communication Society
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• v.21 no.2
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• pp.101-108
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• 2003

We synthesised 1,3-Diphenyl-5-pyren-2-yl-4,5-dihydro-1H-pyrazole(DPP) and investigated its optical properties. The structure of DPP was confirmed by GC-Mass and elemental analysis. The absorption and photoluminescent spectra of DPP were measured at both hydrophobic and hydrophilic solvents and by the stokes shifts of DPP Lippert's equation could be applied. The results showed linear relation between $[{\varepsilon}-1/2{\varepsilon}+1)-(n^2-1/2n^2+1)]$ and $({\mu}_g\;-\;{\mu}_2)^2$.

• Journal of the Korean Graphic Arts Communication Society
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• v.29 no.2
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• pp.45-58
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• 2011

Gravure off-set printing recently is used in electronics display market. This method has advantages of mass production and high printing speed. It is also fine pattern can be implemented. We have manufactured low-curable conductive Ag pastes for gravure off-set printing. When printing, the pastes be used different silver powder shape because of the printing characteristics. The pastes were prepared with silver powder by silver powder shape and size, epoxy resin, solvent and homogenized on a standard three-roll mill. And the pastes exhibited a shear-thinning flow at viscosity profile. Moreover the adhesive strength and resistivity of silver film had a good characteristics. With the manufactured paste in this study, touch panel had is manufactured and it had $4{\times}10-5{\Omega}.cm$.

• Journal of the Korean Graphic Arts Communication Society
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• v.22 no.1
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• pp.39-52
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• 2004

A novel evaluation method is investigated for measuring the ability of acid amplification of acid amplifier. The method is based on the measurement of conductivity change by the acid generation according to UV radiation. It is found that the decrease of conductivity is caused by photopolymerization of epoxy monomer during UV curing process of ink film and the by the rate of UV curing. In this paper, the novel acid amplifiers were synthesized and measured thermal stability by means of DSC. It was found that mono-type acid amplifiers were more stable than di-type. It is possible to make the dynamical evaluation the curing rate of UV curable ink in curing process by this method.

• Journal of the Korean Graphic Arts Communication Society
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• v.27 no.1
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• pp.49-58
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• 2009

Computer to plate technology(CTP) have become fully commercial. The current wide range of computer to plate system and plate makes many potential customers insecure. This process which began around 1995 has now been successfully completed, so that a wide variety of high performance systems is available. The computer to plate method of producing printing plates eliminates films from the production process, thus reducing costs and shortening production times. To discover the optimization formulation of sensitized materials we were changed formulation of resin and violet solution in thermal sensitizers. Also we were analyzed the CTP plate's surface and the result of coating and development at each sample. we were analyzed the effects of development condition as temperature and speed, the plate wear of printing test in C, M, Y, Bk ink. This paper aims to find out suitable ways that we can develop a domestic CTP plate.

• The Journal of Korean Association of Computer Education
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• v.15 no.3
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• pp.25-35
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• 2012

This research has a purpose to help academic high school students to choose their own career by developing an examination that distinguishes between liberal arts and natural sciences. Besides an aptitude test, I identified the necessity of a tool for distinguishing liberal arts and natural sciences, using an examination tool that uses puzzles to distinguish liberal arts and natural sciences and conducted the first examination. On the basis of the result of the first examination I made the second examination test, and the algorithm. After conducting the second examination to a variety of target subjects, like academic high school students, university students, and graduate students through the second examination paper and algorithm for distinguishing liberal arts and natural sciences, competent results have been deducted.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.454-457
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• 2012

Recently, Smartphone takes center stage as the next generation platform, so there's fierce competition between various companies which enter the mobile market. According to Smartphone market is wide, Smart phone sound is more widely. in this paper, we analyze the necessity of sound desing tailored to the characteristics of mobile sources of sound that can be optimized for the iphone mobile production and mobile sources to meet the need for a sound design and the development direction of the sound, professional sound production suggest the need for.

• Journal of the Korea Society of Computer and Information
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• v.15 no.6
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• pp.101-110
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• 2010

This study investigated the relation between the liberal arts education service and students' satisfaction. The results of the study show that students are satisfied with all of five service quality factors, students' intention of studying, full time instructors' teaching and high GPA in taking liberal arts classes. However, educational factors such as the quantity of home work, frequency of test and the size of class, which can influence the quality and contents of classes, do not impact the students' satisfaction of liberal arts education. The college students of Korea may tend to be more satisfied with the liberal arts classes which they feel easier to study and to get better grades.

• Journal of the Korean Chemical Society
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• v.21 no.3
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• pp.187-192
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• 1977

An alternate synthesis of 2-amino-5,6-dimethoxy-1,2,3,4-tetrahydronaphthalene hydrochloride from 2-nitro-3,4-dihydro-5,6-dimethoxy-1(2H)-naphthalenone,was described and compared the overall yields and experimental procedures with the previous synthetic routes obtained from Neber rearrangement product, 2-amino-3,4-dihydro-5,6-dimethoxy-1(2H)-naphthalenone hydrochloride.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2007.11a
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• pp.37-43
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• 2007

In recent years, the cultural industry is considered to a major industry in the 21 century, and performing culture is growing rapidly in Korea. Also, rapid development in terms of quality and quantity can be found in the diversification of usage, a trend focusing on the space for performance, and an emphasis on the accessibility between the stage and auditorium. In addition, active research is being conducted on the performing arts facilities, a relationship between the stage and auditorium, and a space programfor each space considering users. However, most of the current studies are conducted byviewing the facilities in a two-dimensional space. Similar to other cultural facilities, such as museums and galleries, performing arts facilities have been planned in the thinking that the ratio of capacity increases in proportion to the area. Considering a dimensional capacity in the spatial composition of performing arts facilities is important, but it has been ignored until now. Therefore, in order to analyze performing arts facilities in the three dimensional approach, this study is conducted centering on the actual capacity and provides basic data that can be used for planning a construction of future performing arts facilities.

• Journal of the Korean Graphic Arts Communication Society
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• v.26 no.2
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• pp.79-89
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• 2008

Eco printing offers the perfect balance between getting all our printing jobs done without endangering the environment. It is important to realize that the printing industry is no exception to this rampant destruction of the planet's natural resources. In fact, surprisingly enough, its effect on the environment is an extremely harmful one. Like most other production operations, printing houses also produce harmful waste products that pollute the air we breathe in. They also put a great drain on precious natural resources. Printing houses emit what are known as volatile organic compounds (VOCs), caused by the use of petroleum-based inks, laminates, varnishes and adhesives. Studies show that these compounds, when inhaled, greatly increase the risk of asthma attacks. Eco printing, however, has a larger scope than is apparent. Eco printing has a dual essence. In order to understand what it is really all about, the issue of conservation is no less important than the need to stop polluting the environment.