To increase the retention rate of women engineering students as human resources of the field of Graphic Arts and Printing (GAP) industries in South Korea, we introduced the simulation based engineering education method and developed the screen printing simulator for same purpose. Before setting up this education method, factor analysis for female engineering students at P University, which is a model university in South Korea, was conducted. The analytical results showed that social and cultural effects are more significant ones than social effect alone, and the effects of gender discrimination in industrial fields. Also results showed responses that the physical differences between man and women students, such as the ability to drive printing machines or to handle tools, their parents' financial support for experiments, and the gender cognitive engineering education. In this research, we developed the measurement tool to measure women students' competencies in GAP industries and contributed to make the women in engineering education according to the results of factor analysis. These researches have been progressed since 2006 annually, and we had proposed to programs for the gender cognitive engineering education and the special programs for women engineering students. The retention rate of female engineering students was increased from 30% at 2006 to over 50% in 2016. And the rate of women students who change their major from 5% to decreased 1 %. According to the lecture evaluation, 98% of women students were very satisfied the simulated education method. So we found that the factor analysis and the simulated engineering education system for GAP women students have progressed successfully.
Offset paper printing is a promising roll-to-roll technique for color printed materials. Although it is no doubt that understanding ink transfer mechanism in offset printing process is necessary to achieve high printing quality, investing the relationship between inks and substrates at the nip is difficult experimentally due to high printing speed. In this paper, rheological behavior and splitting point of the ink at the nip is studied using package software Ployflow and Flow 3D based on Navier-Stokes equation. Polydimethylsiloxane (PDMS) ink and IGT printability tester were used for an model ink and experiment to compare with that of simulation data, respectively. As a result, higher viscosity at state flow and pressure increased ink transfer due to higher possibility of presence of cavitation at the nip and increase in covering area ratio. These results have shown good agreements with experimental data compared by measuring density of print through.
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