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  2. Plesiochronous digital hierarchy - Wikipedia

    en.wikipedia.org/wiki/Plesiochronous_Digital...

    The worst possible stuffing ratio would be 1 frame in 2, as this gives a theoretical 0.5 bit of jitter. Therefore, the stuffing ratio is carefully chosen to give theoretical minimum jitter. In a practical system however, the actual decision to stuff or not may be made by comparing the read address and write address of the input buffer store.

  3. List of computing and IT abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_computing_and_IT...

    GIMPS—Great Internet Mersenne Prime Search; GIS—Geographic Information System; GLUT—OpenGL Utility Toolkit; GML—Geography Markup Language; GNOME—GNU Network Object Model Environment; GNU—GNU's Not Unix; GOMS—Goals, Operators, Methods, and Selection rules; GPASM—GNU PIC ASseMbler; GPFS—General Parallel File System; GPG—GNU ...

  4. Protein Data Bank (file format) - Wikipedia

    en.wikipedia.org/wiki/Protein_Data_Bank_(file...

    The PDB file format was invented in 1972 [2] [3] as a human-readable file that would allow researchers to exchange the atomic coordinates in a given protein through a database system. Its fixed-column width format is limited to 80 or 140 [ 4 ] columns, which was based on the width of the computer punch cards that were previously used to ...

  5. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [24]

  6. List of academic databases and search engines - Wikipedia

    en.wikipedia.org/wiki/List_of_academic_databases...

    It provides powerful search engine to fulfill search and evaluation purposes for researchers, policy makers, decision makers etc. Subscription ICI [78] IARP: Multidisciplinary: Open-access knowledge management system incorporating grants, publications, conferences in natural and social & behavioral sciences.

  7. PDH - Wikipedia

    en.wikipedia.org/wiki/PDH

    PDH may refer to: Angiotensin-converting enzyme, an enzyme; Plesiochronous digital hierarchy, in telecommunications networks; Pound–Drever–Hall technique for stabilizing a laser's output; Pyranose dehydrogenase (acceptor), an enzyme; Pyruvate dehydrogenase, an enzyme

  8. List of chemical databases - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_databases

    chemical database substances CAS Search; suppliers "Chemindex". Clival Database Clinical Trail Database Clinical Trail Data Solutions 50,000 molecules clinical trail data Phase 0 to IV indications "clival". CMNPD Comprehensive Marine Natural Products Database Peking University: from literature and other databases structural classification; species

  9. DBM (computing) - Wikipedia

    en.wikipedia.org/wiki/DBM_(computing)

    The original dbm library and file format was a simple database engine, originally written by Ken Thompson and released by AT&T in 1979. The name is a three-letter acronym for DataBase Manager, and can also refer to the family of database engines with APIs and features derived from the original dbm.