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 word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
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.