듐 방사선에서 알파선과 베타선 이외에 투과성이 매우 강한 감마선이 있음을 알아내었습니다.
그림 11.1을 보시면 방사선이 전기적으로 대전된 판에 의해서 3가지요소로 나눠지는 것을 볼수있습니다. 첫성분은 음전하를 띠는 판으로 끌어 당겨졌고 그래서 양전하를 띤다. 이것을 알파입자입니다. 양전
1. Market situation-Analysis on Domestic Violence
1) couple violence occurrences
According to survey that carried out 2010, couple violence rate of married couple age between 19 and 65 appears 53.8%. More specifically, physical assault rate is 16.7%, emotional violence rate is 42.8%, financial violence rate is 10.1% and sexual abuse rate is 10.4%. Couple violence rate during whole life afte
Ⅰ.Outline
1. Definition of Learning disability
The term "Learning Disabilities" usually refers to developmental problems in reading, writing, and arithmetic ―the "three Rs" of the classroom that are essential to learning as well as to everyday functioning.
2. Epidemiology
Prevalence of learning disabilities ranges from 2~10 percent of U.S. school children, with rates for b