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.

Low-Cost Sensor Accurately Tracks Cylinder Position
Magnetostrictive sensors that use line-of-flight technology to determine a cylinder’s position are not especially rugged, and resistive potentiometers often lack the necessary resolution or operational life.
What’s the Difference Between Abduction and Adduction (Biomechanics)
In medicine and biomechanics, movements of limbs and other body parts toward or away from the center line of the body (a line that runs up and down the center of the human body) are termed adduction and abduction, respectively.
NASA's new SIAD design
NASA Explores Supersonic Decelerators for Martian Landings
NASA is working to increase payload size for Mars missions.
Making Alloys More Like Bamboo to Increase their Strength 1
Researchers are making alloys more like bamboo to increase their strength.
Lasers Help Identify Biological Targets in Liquids Traveling at 400 mph
Lasers Help Identify Biological Targets in Liquids Traveling at 400 mph
Is clumping density standard, regardless of size?
Is clumping density standard, regardless of size?
From Tomato to Tom-AUTO: Ford and Heinz Team Up
Ford Motor Co. has been working for two years with several companies, including the H.J. Heinz Co., on developing a 100% plant-based plastic that could be used to make automotive parts and fabrics and replace petroleum-based materials.
Canadian Concept Car Chock-full of Connected Technology

The Connected Vehicle Working Group in Canada, established by the Automotive Parts Manufacturers’ Association, crammed all the Canadian–built “connected-vehicle technology” it could find into a concept car, which started as a Lexus RX350. Here are some of the sensors and features that were added:

Locks On Rivers That Stop Invading Species

Around 1900, civil engineers connected the Great Lakes to the Mississippi River Basin to let shippers access both waterways. But within the past 30 years, biologists and the Army Corp of Engineers have been trying to keep aquatic species from moving out of native habitats in the Great Lakes and into the Mississippi River Basin and vice versa.

Wolf, a New Supercomputer, Up and Running at Los Alamos National Lab
Wolf, a new supercomputer, up and running at Los Alamos National Lab.
Basics of Aerospace Materials: Aluminum and Composites 2

Two materials play major roles in modern aerospace: aluminum alloys for airframes and skin, and composites for structures. Here’s a look at both.


There are some aviation observers who predict composites and titanium will rule the roost when it comes to aerospace airframes and structures. But that seems rather unlikely. Aluminum is still lightweight, technically advanced in terms of forming and alloying, and it relatively low cost, especially when compared to titanium and composites.

The First Eight X Airplanes: From Mach 1 to Almost 7
Here’s a look at the first 13 years of X airplanes, going from 1946 through 1959.
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