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  2. Spectral correlation density - Wikipedia

    en.wikipedia.org/wiki/Spectral_correlation_density

    SCD Estimate of Common Communications Signals. The SCD is estimated in the digital domain with an arbitrary resolution in frequency and time. There are several estimation methods currently used in practice to efficiently estimate the spectral correlation for use in real-time analysis of signals due to its high computational complexity.

  3. Slowly changing dimension - Wikipedia

    en.wikipedia.org/wiki/Slowly_changing_dimension

    In many Type 2 and Type 6 SCD implementations, the surrogate key from the dimension is put into the fact table in place of the natural key when the fact data is loaded into the data repository. [1] The surrogate key is selected for a given fact record based on its effective date and the Start_Date and End_Date from the dimension table.

  4. UMTS - Wikipedia

    en.wikipedia.org/wiki/UMTS

    The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunication Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology.

  5. Substation Configuration Language - Wikipedia

    en.wikipedia.org/wiki/Substation_Configuration...

    It describes the interfaces of one project to be used by another project, and at re-import the additionally engineered interface connections between the projects. It is a subset of an SCD file with additional engineering rights for each IED as well as the ownership (project) of SCL data. The last two file types were introduced with Edition 2.

  6. Software release life cycle - Wikipedia

    en.wikipedia.org/wiki/Software_release_life_cycle

    The software release life cycle is the process of developing, testing, and distributing a software product (e.g., an operating system). It typically consists of several stages, such as pre-alpha, alpha, beta, and release candidate, before the final version, or "gold", is released to the public. An example of a basic software release life cycle

  7. Calculation of radiocarbon dates - Wikipedia

    en.wikipedia.org/wiki/Calculation_of_radiocarbon...

    Activity levels, after being normalized to δ 13 C of -25‰, can be divided by this in order to calculate the "radiocarbon age". But as part of their methodology both beta counting and AMS measure standard samples containing carbon of a known activity, and the activity of the sample is divided by the activity of the standard. [8]

  8. Roland Sound Canvas - Wikipedia

    en.wikipedia.org/wiki/Roland_Sound_Canvas

    Also sold as SCD-10 and SCM-10 in bundle with MPU-401/AT. Roland SCB-55 1995 GM GS: 16 28 354 9 18-bit @ 33.1 kHz Daughter board to attach to a Soundcard Waveblaster port. Also sold as SCD-15 and SCM-15 in bundle with MPU-401/AT. Internally 18-bit resolution, will be limited to 16-bit because of daughterboard connector, unless a hardware ...

  9. Standard Form 50 - Wikipedia

    en.wikipedia.org/wiki/Standard_Form_50

    The first four blocks on the SF 50 list the employee's name, Social Security Number, date of birth, and the effective date of the personnel action. The effective date (Block 4) is important for annuity purposes (as an employee nears retirement) as it is the beginning date used to calculate how long an employee has held a particular pay rate for ...