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  2. HTC 7 Surround - Wikipedia

    en.wikipedia.org/wiki/HTC_7_Surround

    The device contains a GPS chip to show the location of the phone, a proximity sensor to turn the screen off during phone calls so that the face doesn't accidentally click the screen, a G-sensor, an ambient light sensor to dim the light in dark rooms and increase the brightness in direct sunlight, and a digital compass.

  3. Electro-optical sensor - Wikipedia

    en.wikipedia.org/wiki/Electro-optical_sensor

    An optical sensor converts light rays into electronic signals. It measures the physical quantity of light and then translates it into a form readable by an instrument. An optical sensor is generally part of a larger system that integrates a source of light, a measuring device, and the optical sensor. This is often connected to an electrical ...

  4. Microoptoelectromechanical systems - Wikipedia

    en.wikipedia.org/wiki/Microoptoelectromechanical...

    This figure first was introduced by M. Edward Motamedi Diagram of a digital micromirror showing the mirror mounted on the suspended yoke with the torsion spring running bottom left to top right (light grey), with the electrostatic pads of the memory cells below (top left and bottom right) DLP CINEMA. A Texas Instruments Technology

  5. Turning - Wikipedia

    en.wikipedia.org/wiki/Turning

    The turning processes are typically carried out on a lathe, considered to be the oldest of machine tools, and can be of different types such as straight turning, taper turning, profiling or external grooving. Those types of turning processes can produce various shapes of materials such as straight, conical, curved, or grooved workpieces.

  6. Twilight switch - Wikipedia

    en.wikipedia.org/wiki/Twilight_switch

    Also, keep in mind that ignition is based solely on the amount of natural light present and not on the height of the sun, so "unwanted ignition" may occur, for example in the presence of compact clouds associated with a significant drop in ambient light on the sensor (e.g., when there is a storm). To avoid this, twilight switches can be ...

  7. Human sensing - Wikipedia

    en.wikipedia.org/wiki/Human_sensing

    Human sensing (also called human detection or human presence detection) encompasses a range of technologies for detecting the presence of a human body in an area of space, typically without the intentional participation of the detected person.

  8. Facial electromyography - Wikipedia

    en.wikipedia.org/wiki/Facial_electromyography

    Zygomaticus major muscle (associated with smiling). Facial EMG has been studied to assess its utility as a tool for measuring emotional reaction. [3] Studies have found that activity of the corrugator muscle, which lowers the eyebrow and is involved in producing frowns, varies inversely with the emotional valence of presented stimuli and reports of mood state [citation needed].

  9. List of instruments used in ophthalmology - Wikipedia

    en.wikipedia.org/wiki/List_of_instruments_used...

    to keep the eyes open during any operation; light wire instrument Needle holders: holding the needle in position while applying sutures •Silcock's needle holder-do-; has a catch and is used for heavier gauge needles; used mainly for skin, muscle and corneal incisions •Arruga's needle holder

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