Q: This might be a dumb question, but is there a way to easily test fer radiation levels, if present, in Seafood? A: "In fact, beta and gamma radiation can be measured with a smartphone, without additional sensors. With the help of an app of the CMOS chip built-in camera can take measurements. Alpha radiation can not be detected in this way - it does not penetrate to the camera chip before. Georg Stamm of the Hannover Medical School and his colleagues have recently tested several apps at the Institute for Diagnostic and Interventional Radiology. Their conclusion: There are some fake applications. "In the smartphone which just makes noise when it is tilted." Two programs worked against these tested the radiologist in the laboratory. The researchers wanted to find out if smartphones could replace the so-called personal dosimeter. This carry all the staff in the radiology department to determine what they are exposed to radiation exposure. Mostly, the film badges that are worn for one month and then evaluated, explained tribe. Alternatively, there are electronic dosimeters, where the evaluation is not done with so much delay, these cost around 700 euros. "As the smartphone could be an effective solution," says Master. And it could be simultaneously used as a mobile service. An App, developed in Munich performed significantly better than the others tested. Whereby this program currently is no substitute for the dosimeter. "That will not be possible without additional external sensors," says Stamm. The problem is the orientation of the sensor in the camera mobile phone. Because it strictly points in one direction, the measured values significantly, if the device is tilted. Christoph Briefs from the Helmholtz Zentrum München is one of the developers of the app "Radioactivity Counter". So far, he sees the program as an application primarily for laymen. Amateur geologists could use it to test, for example, whether rock shows radiation, even jewelry could be tested. And who collect mushrooms and is concerned about possible radiation is able to control his find. Nuclear medicine researchers at the TU Dresden have also tested whether the activities of common nuclides can be reliably measured using the app - and were satisfied with the result. The application is currently less comfortale than many other apps. Thus, a longer measurement for calibration of the device is necessary. and you need to mask off the camera completely, so that the measurement works. article: spiegel.de/wissenschaft/technik/radioactivitiy-counter-app-macht-smartphone-zum-geigerzaehler-a-906841.html link to the app: hotray-info.de/html/radioactivity.html with greetings from Germany ;-)
Posted on: Mon, 23 Sep 2013 04:26:16 +0000
Trending Topics
Recently Viewed Topics
© 2015