Melvin has been an astronaut for 10 years. He says he's trying to be a role model to young African-Americans.

VOA: standard.2010.02.02

He says whatever Mr.Obama does as president, he has already been a successful role model for community work.

VOA: standard.2010.02.24

Bill Hunt,a professor of Biology and Agricultural Engineering at North Carolina State University, has developed an easy-to-use computer model to predict how landscape impacts water pollution.

VOA: standard.2010.08.04

She has been an outstanding role model for everybody black and white."

VOA: standard.2010.05.15

But that model of touristic development has failed to convince some.

VOA: standard.2009.06.04

"Jogja actually has been seen as a successful model for a reconstruction program because the government is very open, the government is very assertive and they are very easily approachable to work with."

VOA: standard.2010.04.14