E.I. du Pont de Nemours & Co. posted second-quarter earnings today, showing significant increases from the second quarter of 2009. Earnings per share rose to $1.26 in the second quarter of 2010, an increase of 80 cents from the same quarter in 2009. Sales increased 26 percent in the quarter. Read more.

The Social Media Club of Des Moines will host Christian Renaud, CEO of Palisade Systems Inc., on Wednesday. He will discuss return on investment in social media. The event will start at 6 p.m. at Jasper Winery, 2400 George Flagg Parkway, Des Moines.

The Department of Energy Computational Science Graduate Fellowship in Ames will receive $3 million to promote science education, Sen. Tom Harkin announced today. The fellowship helps students pursuing a Ph.D. degree in engineering or science.

Aviva USA announced Jeff Fitch as its new senior vice president and chief risk officer on Monday. Fitch has worked as the vice president of risk management since 2009 at Aviva. Before that, Fitch worked at Principal Financial Group Inc.