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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    PDF's emphasis on preserving the visual appearance of documents across different software and hardware platforms poses challenges to the conversion of PDF documents to other file formats and the targeted extraction of information, such as text, images, tables, bibliographic information, and document metadata. Numerous tools and source code ...

  3. Hyaluronidase - Wikipedia

    en.wikipedia.org/wiki/Hyaluronidase

    Four different purified hyaluronidases have been approved for use in the United States, three of animal origin and one recombinant. They are indicated as adjuvants in subcutaneous fluid administration for achieving hydration, for increasing the dispersion and absorption of other injected drugs, or for improving resorption of radiopaque agents, in subcutaneous urography.

  4. Computer file - Wikipedia

    en.wikipedia.org/wiki/Computer_file

    A computer file is a resource for recording data on a computer storage device, primarily identified by its filename. Just as words can be written on paper, so too can data be written to a computer file. Files can be shared with and transferred between computers and mobile devices via removable media, networks, or the Internet.

  5. Hanwha TotalEnergies Petrochemical - Wikipedia

    en.wikipedia.org/wiki/Hanwha_TotalEnergies...

    Founded in 2003 as a joint venture between Samsung General Chemicals and Total (as Samsung Atofina; changed name to Samsung Total in 2004), it was sold to Hanwha in 2015. The company manufactures building block chemicals that go into the making of a host of other chemicals needed to make various consumer products .

  6. Hyaluronate lyase - Wikipedia

    en.wikipedia.org/wiki/Hyaluronate_lyase

    The enzyme hyaluronate lyase (EC 4.2.2.1) catalyzes the chemical reaction. Cleaves hyaluronate chains at a β-D-GalNAc-(1→4)-β-D-GlcA bond, ultimately breaking the polysaccharide down to 3-(4-deoxy-β-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine

  7. Backup - Wikipedia

    en.wikipedia.org/wiki/Backup

    A backup strategy requires an information repository, "a secondary storage space for data" [7] that aggregates backups of data "sources". The repository could be as simple as a list of all backup media (DVDs, etc.) and the dates produced, or could include a computerized index, catalog, or relational database.

  8. Lossless compression - Wikipedia

    en.wikipedia.org/wiki/Lossless_compression

    In fact, if we consider files of length N, if all files were equally probable, then for any lossless compression that reduces the size of some file, the expected length of a compressed file (averaged over all possible files of length N) must necessarily be greater than N. [citation needed] So if we know nothing about the properties of the data ...

  9. Failure of electronic components - Wikipedia

    en.wikipedia.org/wiki/Failure_of_electronic...

    In semiconductor devices, problems in the device package may cause failures due to contamination, mechanical stress of the device, or open or short circuits. Failures most commonly occur near the beginning and near the ending of the lifetime of the parts, resulting in the bathtub curve graph of failure rates.