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  2. Scattering parameters - Wikipedia

    en.wikipedia.org/wiki/Scattering_parameters

    The Scattering transfer parameters or T-parameters of a 2-port network are expressed by the T-parameter matrix and are closely related to the corresponding S-parameter matrix. However, unlike S parameters, there is no simple physical means to measure the T parameters in a system, sometimes referred to as Youla waves.

  3. Rigorous coupled-wave analysis - Wikipedia

    en.wikipedia.org/wiki/Rigorous_coupled-wave_analysis

    Almost without exception, however, the scattering matrices implemented for RCWA are inefficient and do not follow long standing conventions in terms of how S11, S12, S21, and S22 are defined. [5] Other methods exist, like the enhanced transmittance matrices (ETM), R matrices, and H matrices.

  4. List of S-phrases - Wikipedia

    en.wikipedia.org/wiki/List_of_S-phrases

    S21 When using do not smoke. S22 Do not breathe dust. S23 Do not breathe gas/fumes/vapour/spray (appropriate wording to be specified by the manufacturer). S24 Avoid contact with skin. S25 Avoid contact with eyes. S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27

  5. Para-swimming classification - Wikipedia

    en.wikipedia.org/wiki/Para-swimming_classification

    Those with visual impairments are placed in classes S11, S12 and S13. Class S15 is for athletes with hearing loss . Additional classes may be reserved for swimmers with intellectual impairment : S14 , [ 1 ] S18 for swimmers with Down Syndrome or class-S14 intellectual impairment combined with a physical impairment, [ 2 ] and S19 for swimmers ...

  6. S11 (classification) - Wikipedia

    en.wikipedia.org/wiki/S11_(classification)

    As of February 2013, in the S11 50 m Freestyle Long Course, the men's world record is held by Yang Bozan and the women's world record is held by Cecilia Camellini. [7] In the S11 400 m Freestyle Long Course, the men's world record is held by the American John Morgan and the women's world record is held by the American Anastasia Pagonis. [8] [9]

  7. Network analyzer (electrical) - Wikipedia

    en.wikipedia.org/wiki/Network_analyzer_(electrical)

    ZVA40 vector network analyzer from Rohde & Schwarz.. A network analyzer is an instrument that measures the network parameters of electrical networks.Today, network analyzers commonly measure s–parameters because reflection and transmission of electrical networks are easy to measure at high frequencies, but there are other network parameter sets such as y-parameters, z-parameters, and h ...

  8. S12 (classification) - Wikipedia

    en.wikipedia.org/wiki/S12_(classification)

    S12, SB12, SM12 are para-swimming classifications used for categorising swimmers based on their level of disability. History. The classification was created by the ...

  9. Samsung Galaxy S21 - Wikipedia

    en.wikipedia.org/wiki/Samsung_Galaxy_S21

    The lineup of the first three devices was unveiled at Samsung's Galaxy Unpacked event on 14 January 2021. The three devices served as the successors of the 2020 models. All devices' design scheme has changed drastically, redesigning the massive rear-camera module for a slimmer camera module incorporated with the buttons and a uniform appearance for the S21, S21+, and S21 Ultra.