• The Mathematical Education
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• v.51 no.4
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• pp.415-427
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• 2012

This study investigated the perception and utilization about computer of beginning secondary mathematics teachers by utilization frequency of computer. To increase utilization frequency of computer in school mathematics, our finding shows that beginning secondary mathematics teachers should have an interest in computer utilization and perceive computers as an important tool for mathematics learning. In addition, they are likely to use more frequently computer under the condition that computers have sufficient class materials and supplement their shortcomings that have derived less usage in math classes. Therefore, future studies have to investigate not only how to develope textbooks and run after-school classes but also how to make creative discretional activities by computer, which makes computers more useful for teacher training. In sum, the results of case studies for computer usability should be released to motivate computer utilization and increase mathematical thinking ability.

• 한국전기화학회:학술대회논문집
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• 2002.10a
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• pp.19-19
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• 2002

• Journal of Energy Engineering
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• v.3 no.2
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• pp.159-166
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• 1994

• 한국전기화학회:학술대회논문집
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• 2005.04a
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• pp.24-24
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• 2005

• 한국전기화학회:학술대회논문집
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• 2002.04a
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• pp.16-17
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• 2002

• 한국전기화학회:학술대회논문집
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• 2002.11a
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• pp.31-44
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• 2002

• 한국전기화학회:학술대회논문집
• /
• 2003.10a
• /
• pp.17-17
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• 2003

• 한국전기화학회:학술대회논문집
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• 2004.10a
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• pp.28-28
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• 2004

• Carbon letters
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• v.3 no.3
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• pp.155-163
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• 2002

• Journal of the Korean Electrochemical Society
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• v.21 no.1
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• pp.6-11
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• 2018

For the high performance of the secondary battery to satisfy the demands in electronic and energy industries, it is necessary to develop more safe, environmentally friendly and economical electrode. Recently, lithium-sulfur batteries are receiving attention as next-generation secondary cells in terms of its remarkable theoretical capacity, energy density and environmental characteristics. However, they have not yet overcome a fading phenomenon due to the dissolving of the polysulfide. In this study, we intend to fabricate a battery using sulfur, a higher energy density than the other bipolar materials, as an improved secondary cell electrode material. The aim of the study is to improve battery performance with an optimal ratio of the cathode components; such as sulfur of active material and Super P of an electronic conductor.