Abstract
Bioethanol is one of the alternative sources of oil resources which received attention with biodiesel. Many countries produce bioethanol from food sources such as corn and sugarcane, but it causes food-energy conflicts and farmland problem. So it needs to focus on new biomass which is sustainable, renewable, cost-effective and do not occurred any conflicts. Algae are one of the bioma
4. Condition
If reflow, IMC layer occurs between the solder ball and substrate. IMC layer's composition changes depending on reflow time.
Temperatuer
255℃
Reflow time
1s, 1min, 5min, 10min, 20min
Experimental conditions
5. Analysis
IMC layer change was observed according to the reflow time.(Reflow time : 1s, 1min, 5min, 10min, 20min). Do refer to
2. Political and legal issues◎ Safety issue
In 2005, U.S. emergency center reported more than 200 thousand accidents caused by toys. Needless to say, quality improvements and handling safety issue raises cost for the firm. This becomes a great issue considering industry environment described above; aggravated by the increase in production price, coming from the increase in the material cost.
conditions are determined.
Also common to the welfare of former members of the basic items and the choice is made available as a choice, welfare, the classification of items and a range of corporate policies and conditions are determined.
Welfare in the 1970s, food, clothing, housing and livelihood support item was composed. But in the '80s, anniversary gift, a commuter bus, including student
1.Introduction
1.1.Problem statement
Most universities in Korea do not recognize usefulness of facility management budgeting and they still keep using the same way . People are concerned about maintenance of school building less than construction and educational facilities about operation and maintenance are recognized the significance after taking place disaster. Most universities in Korea h