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    "abstract": "THE projectionist in the booth of a modern motion picture theatre usually has numerous duties to perform—among which the most important is that of maintaining a uniformly well lighted picture on the screen. This can only be accomplished and the effect on the screen will be an exact reproduction of the origina scene only if the light source in the lamp house operates at a constant value.",
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
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    "articleType": "orig-research",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "authors": [
      "A. M. Candy"
    ],
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "copyright": {
      "holder": "Society of Motion Picture and Television Engineers, Inc.",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
      },
      "year": "1924",
      "year$meta": {
        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
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    },
    "copyright$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "docId": "10.5594-jj00055",
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      "note": "Derived from DOI 10.5594/jj00055",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "docLabel": "Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924)",
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      "confidence": "medium",
      "note": "Composed from journal title, volume, issue and date",
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      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "docTitle": "“Constant Current and Constant Potential Generators for Motion Picture Projection”",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "docType": "Journal Article",
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      "note": "journal_metadata XML — SMPTE journal paper",
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      "version": "smpte-journal-issue-xml@v1"
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    "doi": "10.5594/jj00055",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "href": "https://doi.org/10.5594/jj00055",
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      "confidence": "high",
      "note": "Constructed from DOI 10.5594/jj00055",
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      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "issn": {
      "print": "0096-6460",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
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    "issn$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "journalAcronym": "MIJR",
    "journalAcronym$meta": {
      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "number": "18",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "pages": "215–222",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "publicationDate": "1924-05-01",
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      "confidence": "high",
      "note": "Day absent in source — padded to 01",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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    "publisher": "SMPTE",
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      "confidence": "high",
      "note": "Normalised to registry \"SMPTE\" convention from publisher-name (SMPTE)",
      "source": "inferred",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
    },
    "publisherLocation": {
      "city": "White Plains, NY",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
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      "country": "USA",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
      "version": "smpte-journal-issue-xml@v1"
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      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Mapped from article_status=\"active\"",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
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    "volume": "8",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_8_18/MIJR16Vol8No18.xml)",
      "source": "parsed",
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