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  2. Ion mobility spectrometry - Wikipedia

    en.wikipedia.org/wiki/Ion_mobility_spectrometry

    Ion mobility spectrometry. Ion mobility spectrometry (IMS) It is a method of conducting analytical research that separates and identifies ionized molecules present in the gas phase based on the mobility of the molecules in a carrier buffer gas. Even though it is used extensively for military or security objectives, such as detecting drugs and ...

  3. Falling weight deflectometer - Wikipedia

    en.wikipedia.org/wiki/Falling_weight_deflectometer

    Falling weight deflectometer. A falling weight deflectometer (FWD) is a testing device used by civil engineers to evaluate the physical properties of pavement in highways, local roads, airport pavements, harbor areas, railway tracks and elsewhere. The data acquired from FWDs is primarily used to estimate pavement structural capacity, to ...

  4. Three-state logic - Wikipedia

    en.wikipedia.org/wiki/Three-state_logic

    Three-state logic. In digital electronics, a tri-state or three-state buffer is a type of digital buffer that has three stable states: a high output state, a low output state, and a high-impedance state. In the high-impedance state, the output of the buffer is disconnected from the output bus, allowing other devices to drive the bus without ...

  5. Train Protection & Warning System - Wikipedia

    en.wikipedia.org/wiki/Train_Protection_&_Warning...

    The first pair, the Overspeed Sensor System (OSS), is sited at a position determined by line speed and gradient. The loops are separated by a distance that should not be traversed within less than a pre-determined period of time of about one second if the train is running at a safe speed approaching the signal at danger.

  6. Olympus OM-D E-M1 - Wikipedia

    en.wikipedia.org/wiki/Olympus_OM-D_E-M1

    The Olympus OM-D E-M1 Micro Four Thirds is a compact mirrorless interchangeable-lens camera introduced on September 10, 2013. It has built-in on sensor phase detection. As of October 2014, it had the highest camera sensor rating of any Olympus camera, according to DxO Labs, with a score of 73. [1]

  7. Wheel speed sensor - Wikipedia

    en.wikipedia.org/wiki/Wheel_speed_sensor

    The most common wheel speed sensor system consists of a ferromagnetic toothed reluctor ring (tone wheel) and a sensor (which can be passive or active). The tone wheel is typically made of steel and may be an open-air design, or sealed (as in the case of unitized bearing assemblies). The number of teeth is chosen as a trade-off between low-speed ...

  8. Flow control (data) - Wikipedia

    en.wikipedia.org/wiki/Flow_control_(data)

    Flow control (data) In data communications, flow control is the process of managing the rate of data transmission between two nodes to prevent a fast sender from overwhelming a slow receiver. Flow control should be distinguished from congestion control, which is used for controlling the flow of data when congestion has actually occurred. [1]

  9. Jitter - Wikipedia

    en.wikipedia.org/wiki/Jitter

    Jitter. In electronics and telecommunications, jitter is the deviation from true periodicity of a presumably periodic signal, often in relation to a reference clock signal. In clock recovery applications it is called timing jitter. [1] Jitter is a significant, and usually undesired, factor in the design of almost all communications links.