# pdf_oxide defect scan — UFO corpus (data-no-ocr, native extraction; pdf_oxide 0.3.74 / 7910d3c)

Scanned **7,288 pages** of native text-layer extraction (xberg + pdf_oxide) across the published `data-no-ocr` corpus. The signatures below are structural artifacts of native PDF text extraction (encoding shifts, missing inter-word spaces, junk text layers); genuinely scanned pages that fell to the OCR fallback cannot exhibit them.

**45 page(s)** flagged across 3 class(es):

| class | severity | pages |
|---|---|--:|
| noise-garbage | high | 6 |
| concatenation | medium | 3 |
| cmap-encoding-shift | high | 2 |

## noise-garbage  (high) — 6 page(s)

| file | page | chars | snippet |
| --- | ---: | ---: | --- |
| `aaro/aaro-hrr-vol1-2024.pdf` | 4 | 4375 | `International Security Environment and Technological Surprise ......................................` |
| `aaro/aaro-hrr-vol1-2024.pdf` | 5 | 1247 | `GNAT 750 ...........................................................................................` |
| `nara-osd/493468580/05_AARO_Historical_Record_Report.pdf` | 5 | 1374 | `05 GNAT 750 ........................................................................................` |
| `pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_3.pdf` | 134 | 4096 | `5000 4000 3000 2000 1000 600 300 200 100 50 40 30 20 10 50 40 30 20 10 50 40 30 20 10 50 40 30 20 10` |
| `pursue-01/pdfs/dow-uap-d48-report-september-1996.pdf` | 5 | 2924 | `Table of Contents 1. Introduction............................... 1 2. Examples Showing Need for Mode` |
| `pursue-01/pdfs/dow-uap-d48-report-september-1996.pdf` | 6 | 2051 | `Appendix A. Failure Response Modes in Program DAMP..................................................` |

## concatenation  (medium) — 3 page(s)

| file | page | chars | snippet |
| --- | ---: | ---: | --- |
| `pursue-01/pdfs/65_hs1-834228961_62-hq-83894_serial_130.pdf` | 27 | 238 | `教育政策与规划是国家对教育发展的指导和管理措施。政府通过制定教育政策，明确教育目标、任务和方向，以确保教育资源的合理配置和有效利用。教育政策与规划包括教育质量、教育投入、教育资源分配、教育创新、教育制度改革、教育管理创新等。教育政策与规划是` |
| `pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_7.pdf` | 111 | 222 | `词语“自立门户”指在没有政府或组织保护的情况下，自行建立自己的事业或经营单位` |
| `pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_8.pdf` | 35 | 4229 | `10\1\2\3\4\5\6\7\8\9\10\11\12\13\14\15\16\17\18\19\20\21\22\23\24\25\26\27\28\29\30\31\32\33\34\35\36\37\38\39\40\41\42\` |

## cmap-encoding-shift  (high) — 2 page(s)

| file | page | chars | snippet |
| --- | ---: | ---: | --- |
| `pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_1.pdf` | 91 | 6752 | `SUCCESS STORIES THE WORLD WAS MISSING A DREAM BUT WE WERE MISSING A DREAM BUT WE WERE MISSING A DREA` |
| `pursue-01/pdfs/dow-uap-d48-report-september-1996.pdf` | 50 | 1695 | `<HHtNn^cn^^inLn'sO^NNxxox^ooHHCNcjcn^J^^^^^^^c? OLnomomomQLnomomomomomomomoLCjQmQinomomom 18CMCMCMCM` |