Publications
Tragedy in the U.S.: why was it possible?
What happened in the U.S. was terrible. But why each time we got terrified by what had already happened and only then we start thinking, how it happened and what should we do to make such things happening as seldom as possible. I am not an expert in flight security (though I work in security system field) but I could say definitely: we are not protected from terrorists in the air.
TV Test Charts
Horizontal resolution is one of the most important characteristics in CCTV. It defines the ability of CCTV to distinguish fine details and distant objects. It's measured in the so-called TV-lines (TVL) - the number of black and white superfine strokes, which can be distinguished. On the other hand, the more the number of TVL, the smaller the details and the farther the removed objects to be observed. As to total videosystem resolution, it depends on all elements: cameras, lenses, amplifiers, cables, video signal processing devices, monitors, quads, multiplexers and so on.