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Usually, the alarm of most RF personal monitors is triggered by instant values, however, standard limits are specified as time-averaged values. Some RF monitors have the possibility to trigger alarms based on average values, which is a better indication of the real exposure situation (as an example, an instant value can be at 200% while the ...
For samples that can be prepared in thin slices, higher precision is obtainable using optical transmission experiments. To fully determine the electronic properties of the material of interest, such measurements are combined with other techniques that work in different frequency ranges, e.g., in the static limit or at microwave frequencies.
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The $7,500 electric vehicle tax credit the Biden administration introduced under the Inflation Reduction Act (IRA) has been a game-changer for American drivers seeking affordable entry into the ...
The manufacture, importation, sale or offer for sale of jamming equipment violates Section 302(b) of the Communications Act of 1934, the FCC says. An FCC representative confirmed Friday that the ...
As an example, a telescope having an f /6 objective and imaging at 0.55 micrometers has a spatial cutoff frequency of 303 cycles/millimeter. High-resolution black-and-white film is capable of resolving details on the film as small as 3 micrometers or smaller, thus its cutoff frequency is about 150 cycles/millimeter.
The Toniebox is an imagination-building, screen-free digital audio toy that plays stories, sings songs and more, and it's still on sale for its same Black Friday price.