• Journal of the Korean Society for Library and Information Science
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• v.50 no.1
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• pp.353-375
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• 2016

Although people seriously worry that "digital paradox" is a "quiet crisis" to our society as a whole and threatens our future generation, we need to reconsider how we utilize digital media for effective learning as we understand its characteristics and compare the differences among all formats of media that used for learning. The purpose of this study is to suggest and analyze school library media programs as Learning Commons by applying the relevant theories on information, learning, learning with media, and meaningful learning. The study assumes the importance of the school library media programs that manage rich Information in various formats in an educational system. The study provides theoretical grounds and insights to practitioners and researchers in the relevant field as they face the challenges in putting an emphasis of today's school library media programs for student learning in digital age.

• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.172-174
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• 1994

Due to the environmental considerations and the energy crisis, there has been a revival of electric vehicles since 1960s. Research and development work concerning with electric vehicles (EVs) was becoming more intense in last decade. As compared with conventional internal combustion engine (ICE) cars, EVs have the advantages of clean, quiet, better energy efficiency, less maintenance and improving the load factor of electric power systems. However, EVs usually have a snort running range, bad acceleration performance and high initial cost. The main reason for these shortcomings is the low figure of energy density and the high per energy cost of battery at present technology state. So it is very important to optimize the overall drive system design with respect to the maximum utilization of battery, energy, motor torque and inverter power. This paper describes a demonstration model of electric car which is driven by 4-wheel direct method using the vector control.