| { |
| "entry_id": "ibm_double_pendulum", |
| "download_sh_written": true, |
| "data_file_built": false, |
| "data_file_path": "data/data.csv", |
| "n_rows": null, |
| "n_cols": 16, |
| "references_downloaded": [ |
| "asseman2018.pdf", |
| "asseman2018.bib", |
| "ibm_double_pendulum_dax.bib", |
| "ibm_double_pendulum_readme.md", |
| "ibm_double_pendulum_index.md", |
| "wikipedia_double_pendulum.html", |
| "wikipedia_double_pendulum.bib", |
| "levien_tan_1993.bib" |
| ], |
| "n_formulas_written": 3, |
| "formula_ids": ["eom_theta1", "eom_theta2", "hamiltonian"], |
| "metadata_yaml_written": true, |
| "description_md_written": true, |
| "reference_scores_computed": false, |
| "reference_scores_by_formula": { |
| "eom_theta1": {"nmse": null, "r2": null, "rmse": null, "kendall_tau": null, "mape": null}, |
| "eom_theta2": {"nmse": null, "r2": null, "rmse": null, "kendall_tau": null, "mape": null}, |
| "hamiltonian": {"nmse": null, "r2": null, "rmse": null, "kendall_tau": null, "mape": null} |
| }, |
| "contamination_tier": "high", |
| "notes": "Primary data source (IBM DAX CDN at dax-cdn.cdn.appdomain.cloud) was not DNS-resolvable from the authoring environment; download.sh was authored and tested (it fails cleanly with a hand-download fallback message), but data.csv was not built and reference_scores are therefore null. Paper (Asseman, Kornuta, Ozcan 2018, NeurIPS MDSD workshop) is saved at reference/asseman2018.pdf; it documents the apparatus (l1 = 91 mm, l2 = 70 mm, camera 400 Hz, 480x480 px) but NOT the bob masses m1, m2 or any dissipation model. Formulas are the textbook simple-pendulum (two point-mass) Lagrangian form: eom_theta1 and eom_theta2 are Euler-Lagrange, hamiltonian is T + V. All three were verified bit-exact against an RK4-integrated trajectory (max |f(X) - rhs| = 0.0 on 500 test points; H conserved to ~1e-5 J/kg over 20 s integration). Mass convention m1 = m2 = 1 kg because IBM does not report values; data.csv column H_mpernorm uses the same convention. Upstream columns (x_red, y_red, x_green, y_green, x_blue, y_blue in 5x-upscaled pixels) are preserved; derived columns (theta1, theta2, omega1, omega2, and their second finite differences) are documented in data/README.md. Default data.csv = video 0 of 21; data_all_videos.csv is the full concatenation. Contamination tier 'high' because the Lagrangian form is textbook standard, but the specific apparatus dimensions and real dissipation structure are low-contamination. Suggested use: Track C (red-team) probe for the Lagrangian form + Track B scoreable on the dissipation-dominated H residuals." |
| } |
|
|
