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  2. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids ( TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

  3. Time-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Time-division_multiplexing

    e. Time-division multiplexing ( TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern. It can be used when the bit rate of the transmission medium ...

  4. Terahertz time-domain spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Terahertz_time-domain...

    In physics, terahertz time-domain spectroscopy ( THz-TDS) is a spectroscopic technique in which the properties of matter are probed with short pulses of terahertz radiation. The generation and detection scheme is sensitive to the sample's effect on both the amplitude and the phase of the terahertz radiation. Fourier transform of the above pulse.

  5. Speedtest.net - Wikipedia

    en.wikipedia.org/wiki/Speedtest.net

    Speedtest. Speedtest.net, also known as Speedtest by Ookla, is a web service that provides free analysis of Internet access performance metrics, such as connection data rate and latency. It is the flagship product of Ookla, a web testing and network diagnostics company founded in 2006, and based in Seattle, Washington, United States. [5] [6]

  6. Multimedia over Coax Alliance - Wikipedia

    en.wikipedia.org/wiki/Multimedia_over_Coax_Alliance

    The Multimedia over Coax Alliance (MoCA) is an international standards consortium that publishes specifications for networking over coaxial cable.The technology was originally developed to distribute IP television in homes using existing cabling, but is now used as a general-purpose Ethernet link where it is inconvenient or undesirable to replace existing coaxial cable with optical fiber or ...

  7. Teleprinter - Wikipedia

    en.wikipedia.org/wiki/Teleprinter

    A teleprinter ( teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations. Initially, from 1887 at the earliest, teleprinters were used in telegraphy. [1]

  8. TypeRacer - Wikipedia

    en.wikipedia.org/wiki/TypeRacer

    Registration. Free. Launched. March 2008. Current status. Online. TypeRacer is a multiplayer online browser-based typing game. In TypeRacer, players complete typing tests of various texts as fast as possible, competing against themselves or with other users online. It was launched in March 2008.

  9. Student's t-test - Wikipedia

    en.wikipedia.org/wiki/Student's_t-test

    The two-sample t-test is a special case of simple linear regression. The two-sample t-test is a special case of simple linear regression as illustrated by the following example. A clinical trial examines 6 patients given drug or placebo. Three (3) patients get 0 units of drug (the placebo group).