Stephen Mraz

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.

Articles
Biosensor Tracks Health by Looking at Sweat 2
A personal biosensor analyzes a soldier’s sweat to determine his health during training and missions.
Nanotubes Keep Drone Wings Ice-Free

Engineers at Battelle Memorial Institute, Columbus, Ohio, have tested their HeatCoat, a device for keeping ice off the wings and control surfaces of drones. It consists of a carbon-nanotube coating that can be sprayed on or applied in flexible sheets. Sending electricity through the panel or coated area generates enough heat to prevent ice from forming and break free any ice that has formed. A controller monitors weather conditions and heater performance, ensuring power is only used when needed.

New Nanosphere Material May Overcome Limits of Lithium Ions 1
A research team at Rensselaer Polytechnic Institute, Troy, N.Y., has developed a new material—cobalt-oxide meoporous nanospheres—that could overcome two of the major limitations of lithium-ion batteries.
Backscatter Diffraction Uncovers Removed Serial Numbers

Crooks trying to hide their crimes or identities by filing the telltale serial numbers and markings from firearms, cars, or bullet casings could soon have a new forensic technique to worry about: backscatter diffraction. Engineers at the National Institute of Standards and Technology (NIST) have found a way to use this technique to read the imprint of letters and markings that were stamped into metal, but then polished or ground off.

New Flow Battery Could Back-Up Local Grids, Power Cars and Trains 1
A new zinc-polyiodide redox flow battery developed at the Pacific Northwest National Laboratory (PNNL) has nearly the energy density of lithium-ion batteries, and is inherently fire safe.
Energy Dept. and NSF Plan Powerful Telescope and Camera for South America

The U.S. Energy Dept. and National Science Foundation (NSF) have finalized designs for the world’s largest digital camera. It will weigh 6,160 lb, be roughly the size of a small car (5.3  10 ft), and will take flat images that measure 25-in. in diameter and contain 3.2 gigapixels. The camera is planned as part of the large synoptic survey telescope (LSST) that the two organizations will construct 1.7 miles above sea level on Cerro Pachón, a mountain in Chile.

Shelby Cobra Recreated Using 3D Printing

Engineers at the Oak Ridge National Laboratory in Tennessee built a replica of the Shelby Cobra to celebrate the car’s 50th anniversary.

Self-Powered Keyboard Provides a Biometric Layer of Security

A self-powered keyboard developed at the Georgia Institute of Technology can charge up electronic devices and prevent unauthorized persons from accessing the computer.

Inventors Opt for Disclosure Over Secrecy 1
Inventors opt for disclosure over secrecy
Proper Surface Prep: An Adhesive’s Best Friend

Strong, long-lasting adhesion depends more than just selecting the right adhesive. It also requires that the best surface preparation techniques be used. In this context, “surface” refers to the area and depth where the adhesive interacts with the substrate. The affinity of the adhesive with this surface ultimately determines bond strength. Whether bonding metals, plastics, or rubbers, proper surface preparation always plays an essential role in getting the best bond.

The Internet of Things: Our Inevitable Future or a Pipe Dream? 1
Several technologies are poised to create the IoT, but daunting hurdles still stand in the way.
A Hydraulic Pump for High-Pressure Applications
Engineers at Moog developed the RKP 250 radial piston pump, in part, to let customers pump more volume using a smaller motor with a simplified interface.
Hospital Bed Helps Patients and Nurses
A new hospital bed from Hil-Rom, the Advanta 2, was designed based on suggestions from working nurses on what would make the bed easier to use.
X-planes: The Next Eight: X-24 through the X-38 2
X planes from 1959 through 2002 were used to explore technologies that would be later used on the Space Shuttle, on fighter aircraft, and drones.
2015 Concept Vehicles Explore the Future 2
A look at some of the concept vehicles from the 2015 Detroit Auto Show.
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