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 by Stephen Mraz
November 7, 2013 Letters 1

Bosses and Boomers

Leland Teschler’s editorial on knuckleheaded bosses brought in dozens of comments, most describing nitwit leaders. (You can see many of these comments online at http://tinyurl.com/mqwcpdm). Another reader chimes in that baby boomers didn’t make very good engineers, either.

Electric actuator lines up packages on a conveyor

Engineers at Intralox L.C.C, Harahan, La., used electric actuators to improve the speed and precision of a palletizing unit that takes variously sized products from a conveyor, and lines them up and orients them to form layers on shipping pallets.

Ocean-going ships to use hulls as sails 9

Marine engineers at Lade AS in Norway have designed a freighter with a hull shaped to harness the power of the wind, letting the ship save 60% on fuel costs while emitting 80% fewer emissions.

Machine Design’s 2013 Salary Survey

This year’s salary survey gathered compensation data, as well as information on perks, from over 5,000 engineers. Overall, it painted a picture of the engineering profession as one where members are well paid, earning an average of almost $93,000. But the average bump in salary of 1.57% over last year shows that even engineers continue to feel the effects of an economy trying to rebound.

Microbes eat sewage and generate electricity 1
Microbes convert waste into electricity.
A new, low-cost process extracts magnesium from seawater
A new process that lowers the cost of extracting magnesium
Falling particles capture solar energy 4
Falling ceramic particles capture thermal energy from concentrated sunlight to power turbines and generate electricity.
A “Smart” Set of Stack Lights

The Smart Light from Balluff, Florence, Ky., connects to practically any industrial network via IO-Link, an open and standard communication protocol. This lets the light display a wide range of information such as machine speed, throughput, position feedback, feeder-bowl level, or tank level.

Differential Pressure Transducer Monitors Flow
The AST5300 wet/wet differential pressure sensor from American Sensor Technologies, Mount Olive, N. J., measures the difference in pressure between two points, and, when used with signal processing, can monitor flow, filter condition, and fluid levels.
October 10, 2013 Letters 1

One engineer can make a difference

A reader wants to make sure others know who is responsible for the engineering that helps explain and solve water hammer. Another reader points out that engineers have been developing tools and technology that eliminates engineering jobs for a long time.

Low-temperature diesels: A cleaner, more-efficient option for cars

Research into how fuel and air mix and burn inside diesel engines could lead engineers at Sandia National Laboratory to devise a low-temperature combustion (LTC) diesel engine with high fuel mileage and low levels of pollution.

Getting Robots to Walk
An engineering team is exploring walking as an efficient, simple way for robots to move around.
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