• Environmental and Resource Economics Review
• /
• v.18 no.1
• /
• pp.139-158
• /
• 2009

With the sample of Middle East crude oil imported to South Korea, this study empirically analyzes the effectiveness of the risk management strategies using derivatives such as futures and options. Assuming the hedging period of one to twelve months, it considers a spot purchasing strategy, 1 : 1 futures hedge strategy, OLS-based minimum-variance futures hedge strategy, buying call option strategy, and collar transaction strategy. According to the ex-ante result, using the derivatives of futures or options makes lower the procurement costs when the crude oil prices is increasing. With the hedging period less than or equal to six months, the hedging strategy using futures turns out to be superior in terms of procurement cost reduction and hedging effectiveness improvement. In contrast, the hedging strategies of buying call option and collar transaction would generate better results when the hedging program last over six months.

• Journal of Family Resource Management and Policy Review
• /
• v.7 no.2
• /
• pp.1-23
• /
• 2003

Entering into the mature stage of internet society, we need to understand people's internet using qualitatively. So, this study purposed to relate the types of internet usage and the types of household work using internet by the family except housewife. Web-based questionnaire were administered to 250 male and female subjects respectively. Results were as follows: First, types of internet usage were‘e-style’,‘self-actualization’, and‘family-oriented’. Second, the characteristics of e-style were white collar, college- graduated, and high income. And this type had positive attitude about internet, longer periods of usage, higher level of computer skill, longer usage time than my other types. Third, types of household work using internet were‘commitment in transaction’and‘strong involvement in family life’. fourth, the e-style and the self-actualization were related with the type of commitment in transaction and the family oriented was related with the type of strong involvement in family life. Finally, if the e-style increase, family members except housewife, there are trend of commitment in the household work.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.7 no.1
• /
• pp.141-147
• /
• 2012

Blind persons are information alienation class in spite of development of an Information-Communication technology. Need dog's paw of a business automation technology that apply Information-Communication know-how to do these in white-collar job go to work. I wish to develop VI 05 that can improve computer practical use ability by developing integration solution that can analyze know-how that need in transaction of business and overcome this technologically. Because developed VI 05 reserves and handles work that require screen spread, function that convert data of screen including character into voice, accuracy by integration solution that is necessary in transaction of business the process simplificaton make function that need in Secretariat state process such as knowing function have.