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The scanning helium microscope (SHeM) is a form of microscopy that uses low-energy (5–100 meV) neutral helium atoms to image the surface of a sample without any damage to the sample caused by the imaging process. Since helium is inert and neutral, it can be used to study delicate and insulating surfaces.
As the helium ion beam interacts with the sample, it does not suffer from a large excitation volume, and hence provides sharp images with a large depth of field on a wide range of materials. Compared to a SEM, the secondary electron yield is quite high, allowing for imaging with currents as low as 1 femtoamp. The detectors provide information ...
Caller-ID system response sounds in various cases: analog, ISDN and digital PBX Caller identification (Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.
As helium ions can be focused into a small probe size and provide a much smaller sample interaction than high energy (>1 kV) electrons in the SEM, the He ion microscope can generate equal or higher resolution images with good material contrast and a higher depth of focus. Commercial instruments are capable of sub 1 nm resolution. [21] [22]
Caller ID is a well-known and well-established modern-day convenience. However, as I suspected might be the case, my online Wikipedia research indicated that Caller ID Spoofing seems to be rather common and easy for those inclined to implement regardless of the questionable legal status of actually using such spoofing mechanisms. Such legal ...
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The officers then used their personal cell phones to take photos of nude images they found – often images of the women, but in a few cases images of other people, the indictments say.
This is a list of 3D-enabled mobile phones, which typically use autostereoscopic displays. Some devices may use other kinds of display technology, like holographic displays or multiscopic displays. Some devices employ eye tracking in aiming the 3D effect to the viewer's eye.