CONTEXT The age at sexual debut is declining in China, but little is known about the relationship between the social and demographic characteristics of Chinese youth and the timing of debut. METHODS Data were drawn from the 2009 National Youth Reproductive Health Survey, which collected background information and age at sexual debut from 22,300 unmarried youth aged 15-24. Life table analysis ...

This study was conducted to compare the effectiveness of the traditional method of ankle bandaging and the new method of ankle taping for judo athletes in Japan, and to introduce a functionally effective taping method for judo players. Four university judo athletes with ankle instability were selected to undertake radiography of the ankles before and after exercise, with bandaging at one time a...

Construction sites are not generally flat but heterogeneous. It would be of significance to explore the patterns ground response where soil and rock strata laterally distribute near surface. Shaking table test scaled free-field model is conducted investigate local site effect caused by influence soil-rock strata. In this test, with artificial designed reproduce dynamic characteristics prototype...