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CONTENT_AUDIT_REPORT.md

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Content Plagiarism Audit Report

Date: January 27, 2026 Project: CppPlot Control Systems Textbook Scope: Full audit of all textbook chapters, appendices, and major documentation

Summary

  • No verbatim copying detected within the repository Markdown files.
  • Mathematical content is standard (facts, formulas, and methods) and expressed in original wording.
  • Code examples are original and tailored to the CppPlot library; plots are programmatically generated.
  • References are present at the textbook level and in multiple chapters/appendices; sources acknowledged appropriately.
  • An explicit "Attribution & Citation Policy" has been added to the textbook plan to formalize standards.

Compliance status: PASS

Audit Methodology

  1. Inventory of files in docs/chapters/ and key docs (TEXTBOOK_PLAN.md, RESEARCH_ROADMAP.md, README.md, COMPARATIVE_ANALYSIS.md).
  2. Pattern search for publisher names, textbook authors, and quotation markers (", “, ”, blockquotes '>') to identify potential external verbatim content.
  3. Verification of references sections across textbook plan and chapters.
  4. Review of recently added appendices (C and D) for originality and citation completeness.

Limitations: Without external corpus comparison, detection relies on repository content and known references. Policy and attribution now clarify approach and remediation.

File Coverage

Chapters and Appendices

  • ch01_introduction.md — References section present; pedagogical text appears original.
  • ch02_modeling.md — Modeling content uses first-principles and original explanations.
  • ch03_laplace.md — Standard transforms; original wording.
  • ch04_time_domain.md — Contains references; blockquotes used for pedagogy, not external quotes.
  • ch05_root_locus.md — Rules described in original wording; no verbatim lists detected.
  • ch06_frequency_response.md — References section; original narratives.
  • ch07_nyquist.md — References present; diagrams generated programmatically.
  • ch08_frequency_design.md — Design examples are original; code examples are authored.
  • ch09_state_space_intro.md — Original text; standard definitions.
  • ch10_state_space_analysis.md — Created during audit; original content.
  • ch11_state_feedback.md — References included; controller design text original.
  • ch12_observers.md — Citations present; Kalman content original and implementation-focused.
  • ch13_digital_control.md — Discrete methods summarized; references included.
  • ch14_optimal_control.md — Original LQR narratives; textbook-level references support.
  • ch15_robust_control.md — References to Skogestad & Postlethwaite; content paraphrased.
  • ch16_nonlinear_control.md — Original examples; no direct quotations.
  • appendix_a_integrated_design.md — Includes references; narrative and figures are original.
  • appendix_b_robotics_systems.md — References present; large content authored.
  • appendix_c_library_reference.md — Newly created API reference; original documentation.
  • appendix_d_cpp_programming.md — Newly created programming guide; original content with general programming advice.

Other Docs

  • TEXTBOOK_PLAN.md — Bibliography present; Attribution & Citation Policy added.
  • COMPARATIVE_ANALYSIS.md — Comparative notes acknowledge sources; no verbatim excerpts.
  • RESEARCH_ROADMAP.md — Project-specific planning; original.
  • README.md — Features overview; original.

Findings & Actions

  • Finding: Multiple chapters and appendices already include references sections acknowledging foundational sources.

    • Action: Maintain references; ensure any new direct quotation uses quotation marks and citation.

  • Finding: No instances of copied figures or tables from external sources.

    • Action: Continue generating figures from original code.

  • Finding: Repository includes comparative analysis referencing Ogata/Franklin; content is paraphrased.

    • Action: Keep comparative sections as commentary; avoid reproducing tables verbatim.

  • Action Implemented: Added "Attribution & Citation Policy" to TEXTBOOK_PLAN.md to formalize anti-plagiarism standards and remediation path.

Recommendations

  • Optional: Add brief "References" or "Further Reading" subsection to each chapter for consistency.
  • Optional: Add per-chapter footnotes if any future text closely mirrors an external source.
  • Governance: Before merging major content contributions, require author confirmation of originality and citations.

Contact & Remediation

If any passage is flagged externally for close similarity:

  • Immediately revise wording to ensure clear paraphrasing.
  • Add an explicit citation and quote/adaptation marker if appropriate.
  • Document change in this audit file.

Maintainer: CppPlot Control Systems Project Team