Michael Dumiak

Michael Dumiak
Articles
Researchers Hunt For Path To Noise Reduction 

Temperatures soar to beyond 1,000C in the turbine sections of helicopter engines. This is hardly a hospitable environment for a condenser microphone.

But Berlin-based German Aerospace Center (DLR) researchers, because they needed to take sound measurements in just such inhospitable places for experiments useful in the decades-long pursuit of quieter helicopters, have designed a special housing and coiled sound canal probe for the job.

Bio-Inks And 3-D Printing May Yield Artificial Blood Vessels 

A Stuttgart, Germany-based research team working on building artificial blood vessels with 3-D printers recently took another step forward by developing gelatin “bio-inks” that can be sprayed through inkjet nozzles without clogging them.

Albatross Study May Inform Flight Efficiency
Engineers seek lessons from birds with huge wingspan
Deterrent Tone Works For LRAD 

An Asian shipping company looking to boost its antipiracy defenses started the year by becoming the latest client of the LRAD Corp. of San Diego, maker of long-range acoustic hailing devices that can rumble sound over water for more than a mile and cause hearing damage from 50 ft. away.

LRAD stands for long-range acoustic device, the general term for the acoustic systems the company makes.

Europeans Look To Provide Solar Event Forecast
In November, Comesep will debut its new space weather alert system
Space Weather Forecasting Push Underway In Europe 

BERLIN — Researchers at more than half a dozen European space institutes are working to build better tools to forecast the space weather patterns produced by the Earth’s Sun.

Space weather events such as solar flares and coronal mass ejections (CMEs) create streams of energetic particles that can adversely affect astronaut health, satellite operations and terrestrial power grids.

Europeans Look To Improve Space Weather Forecasting 
BERLIN - Researchers at more than half a dozen European space institutes are working to build better tools to forecast the space weather patterns produced by the Earth’s Sun.
Pacific Pivot Could Get More Congressional Attention
Chinese territorial claims in the region have caused many to fear possible military actions
Germany Launches Latest Round In Decade-Old Shefex Program 

BERLIN – German researchers are pleased so far with the results of their summer launch of a rocket-boosted hypersonic demonstrator, which reached 11 times the speed of sound, even though it is now clear they will not be able to recover the vehicle payload from its resting place at the bottom of the Greenland Sea.

Vibrating Sensors 

The Michigan lab that introduced the notion of beetle-generated power for remote-controlled, insect-borne reconnaissance sensors is back—this time with an idea to generate energy from low-frequency ambient sound.

Latest Shefex Shot Keeps Germany In Hot Pursuit
DLR launches latest round in decade-old Shefex program
Energy Generation From Sound Has Military Applications 

BERLIN — A Michigan lab is exploring an idea for generating energy from low-frequency ambient sound using tiny ceramic piezoelectric generators — a concept of interest to military planners looking for ever-smaller, cheaper and more durable power sources for sensors.

Researchers at the University of Michigan Center for Wireless Integrated Microsystems plan to publish a scheme for a low-frequency-powered ceramic piezoelectric generator in an upcoming issue of the Journal of Microelectromechanical Systems.

Germany Launches Latest Round In Decade-Old Shefex Program 
BERLIN - German researchers are pleased so far with the results of the most recent flight of their rocket-boosted hypersonic demonstrator, which reached 11 times the speed of sound. (Photo: DLR)
Researchers Explore Generating Energy From Sound 
A Michigan lab is exploring an idea for generating energy from low-frequency ambient sound using tiny ceramic piezoelectric generators -- a concept of interest to military planners looking for ever-smaller, cheaper and more durable power sources for sensors.
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