Joel Johnson, an Ohio State University associate professor of electric engineering, is using a new radiometric sensor that detects plastic mines that are invisible to metal detectors. The sensor detects low-frequency microwave radiation. "With lower frequencies, the advantage is that you can detect more types of objects, but the image isn't as clear as with millimeter wave technology," he says. The sensor is considered passive because it only detects radiation and doesn't emit it like other detection technologies. All objects emit some low level of microwave radiation, which is what his sensor detects. Johnson's sensor picks up the unique microwave signature that is dependent upon the material from which the object is made. Johnson and graduate student Min Zhang developed computer models that take into account the different signatures. The same technology is suitable for detecting the roughness of the ocean surface, which could help meteorologists study weather patterns. Johnson says that the National Oceanographic and Atmospheric Administration, the Department of Defense, and NASA are involved with the project and there are plans to launch the microwave sensor on a satellite in the next few years. The Office of Naval Research sponsors the project. Radiometric (Boulder, CO) is building the sensor. For more information contact Johnson at (614) 292-1606 or send e-mail to email@example.com.
The promise of the Internet of Things (IoT) is that devices, gadgets, and appliances we use every day will be able to communicate with one another. This potential is not limited to household items or smartphones, but also things we find in our yard and garden, as evidenced by a recent challenge from the element14 design community.
If you didn't realize that PowerPoint presentations are inherently hilarious, you have to see Don McMillan take one apart. McMillan -- aka the Technically Funny Comic -- worked for 10 years as an engineer before he switched to stand-up comedy.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.