"Hope springs eternal" has become the rallying cry this time of year for fans and players alike as the baseball season gets underway.

The April 2010 Letters section includes letters concering the articles "Satisfaction" from the January issue, and "Natural Design with Constructal Theory" and "C for the Course" from September.

This month's News & Notes column includes "New Bones from Metal Foam" and "International Handshake."

"Haitian Image," "Ball Track" and "Nuclear View" are among the items in the April 2010 Computing section.

Fluid Handling and Fluid Power is the theme of this month's Technology Focus section.

John Ratzenberger is the co-founder of Nuts, Bolts & Thingamajigs, a foundation dedicated to introducing young people to manufacturing and trade careers.

Offshore Technologies: Fluids passing over objects can set up vortices. Technology can capture energy from the turbulence and convert it into clean, cheap electricity.

Offshore Technologies: To reach the most sustained and powerful winds, and to preserve the view, offshore wind turbine deployment needs to be practical in deeper waters.

Biofouling slows vessels and wastes fuel, so the Navy is looking at an underwater robot to keep its hulls shipshape.

What design options do you have when production won’t top a thousand pieces a year? Plenty, if you know the ropes.

By reducing parts count and easing assembly, one plasma cutter maker explores customized manufacturing.

Intellectual Property and Patents: Technical preparation isn’t always a requirement for making decisions about inventions. And that may not be all bad.

Professional baseball has not changed appreciably in over 100 years. That isn’t the case, however, with amateur level baseball and with softball.

Software Exchange features "Duct Sizer," "Share CAD" and "CFD Comparisons" this month.

This month's New Products include pressure switches, mini lead screw assemblies, and ergonomic hand tools.