Stephen Mraz

Senior Editor,
Machine Design

Steve serves as Senior Editor of Machine Design.  He has 23 years of service and has a B.S. Biomedical Engineering from Steve was a Flight officer in the U.S. Navy. He is currently responsible for areas such as aerospace and medical.

Legendary Corvettes Throughout the Years
A look at some of the most legendary Corvettes throughout history.
The LT4: Another Legendary Corvette Engine 8
Chevy and GM engineers have developed and manufactured their most powerful production engine ever. Here’s a look inside the LT4 engine and some of its subsystems.
Hybridized 3D-Printed Part Combines Plastic and Metal
When a client quickly needed a working prototype of a rifle magazine, the designers and technicians at Baklund R&D knew they would have to use hybridized 3D printing.
“Oops, I Dropped the Warhead!” (On Purpose)
The Defense Dept. drop tested its latest nuclear warhead, the W88 ALT 370, the follow-up to the W88.
3D Printed Inverter Could Kickstart Electric Cars
Engineers at Oak Ridge National Laboratory have combined 3D printing and a wide-bandgap version of silicon carbide to come up with a lightweight, compact 30-kW traction-drive inverter.
Fighting Friction with a Nanolayer of Graphene
Researchers at the Argonne National Laboratory have developed a method of bonding a uniform layer of graphene only one atom-thick directly to steel.
Adaptive Optics Lets Soldiers Zoom in on Targets
The scope, called the “rapid adaptive zoom for assault rifles” (Razar), lets soldiers shift magnification without taking their hands off the rifle or eyes off the target, a problem with the current scope.
Oil-Shear Clutch-Brake Lets Lacrosse Stick Swing Realistically
Shear-oil clutch brake lets lacrosse stick swing realistically.
Powering Implants with Ultrasound
Powering wireless implants with ultrasound
Roboticists and Biologists Learn from Sidewinder Rattlesnakes
Sidewinders teach biologists and roboticists a thing or two.
Researchers Develop World’s Thinnest Generator
Introducing the world’s thinnest electric generator.
85 Years Ago: Machine Design’s First Year: Part 1 2
John F. Hardecker, the chief draftsman of the U.S. naval aircraft factory, begins a six-part series outlining how to run a ship-shape design team. He finishes the article with some words on standardization: “In conclusion, while standardization has its faults and pitfalls, these best can be avoided by keeping constantly in mind the true meaning of standardization.
Developing Medical Devices with 3D IM
Derek Mathers, business development manager at Worrell Inc., a design, development, and strategy firm, discusses how 3D printing is changing the way companies operate and how the technology itself is continually changing.
Earthquakeproofing for Concrete Bridges
Engineers at Washington University have developed a design for the framework of columns and beams that support reinforced concrete bridges so they will better resist earthquakes and be erected faster and less expensively.
Wearable Air Bag Protects Against Hip Fractures
Every year, one out of every three adults over the age of 65 falls, causing five times as many hospital stays as any other accidents and costing Medicare beneficiaries anywhere from $14,000 to $20,000. Worse yet, one in

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