{
  "definitions": {
    "face_opening_mm": "Mean signed normal distance between affine images of the same reference face; only opposing nonzero native digits for that cut are included. Null means no eligible pairs.",
    "interior_volume_change_percent": "100 * (current signed tetrahedral volume / reference volume - 1); six tetrahedra per complete interior lattice cell, excluding cells crossing recorded cut planes. Middle third for two-cut tofu, all sampled piece interiors otherwise. Inverted tets are counted, never hidden with abs().",
    "centroid_x_from_start_mm": "Equal-mass native particle centroids of fixed reference regions, ordered left to right; displacement from reference positions.",
    "centroid_x_from_probe_mm": "Same centroids relative to the exact saved motion-start frame; null before it. Continuous push: final-cut end (tofu 3.30 s, banana 5.30 s); legacy knife-push/no-push: 4.00 s; impulse: probe_time_s.",
    "knife_on_material_x_n": "Negative of recorded material reaction on the knife in world x at the preceding completed substep; negative means the knife pushes material left. Excludes drive and board.",
    "knife_on_material_n": "World xyz force of the knife on the material, N; negative of the saved material reaction on the knife at the preceding completed substep. Zero at the initial state. Excludes drive and board.",
    "dynamic_viscosity_pa_s": "Newtonian dynamic viscosity from the saved material configuration, Pa s; missing historical configuration fields mean the elastic value zero.",
    "motion_start_time_s": 4.0,
    "knife_material_force_n": "Norm of recorded material reaction on the knife at the preceding completed substep; excludes guide, drive and board forces.",
    "reference_volume_m3": 2.0796875000000023e-05,
    "tetrahedra": 7986,
    "cut_planes_m_in_execution_order": [
      0.015033569381013105,
      -0.015012841163554159
    ],
    "cut_plane_source": "Median recorded blade position while cutting; uncut controls use the densest recorded position cluster. Axis-aligned paths that sweep laterally by more than half a material spacing are rejected.",
    "cut_normal_axes": [
      0,
      0
    ],
    "comparison_scope": "Native DexLab measurements; original authors sampling and full configuration are unavailable, so these are not same-condition cross-method scores."
  },
  "frames": [
    {
      "state_frame": 0,
      "trace_frame": 0,
      "time_s": 0.0,
      "phase": "Initial",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
      ],
      "interior_volume_change_percent": 0.0,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        0.0,
        0.0,
        0.0
      ],
      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": 0.0,
      "knife_on_material_n": [
        0.0,
        0.0,
        0.0
      ],
      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 5,
      "trace_frame": 199,
      "time_s": 0.05,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
      ],
      "interior_volume_change_percent": -0.10507345592776218,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        -0.19669756625698268,
        -2.4093381610788985e-17,
        0.19669756625698223
      ],
      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
      ],
      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 10,
      "trace_frame": 399,
      "time_s": 0.1,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
      ],
      "interior_volume_change_percent": -0.19845191131219186,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        -0.33385779307391844,
        -2.810894521258715e-16,
        0.3338577930739173
      ],
      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
      ],
      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 15,
      "trace_frame": 599,
      "time_s": 0.15,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
      ],
      "interior_volume_change_percent": -0.49454340605643576,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        -0.16103898430622582,
        -4.858831958175779e-16,
        0.16103898430622626
      ],
      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
      ],
      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 20,
      "trace_frame": 799,
      "time_s": 0.2,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
      ],
      "interior_volume_change_percent": -0.6916002029204282,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        -0.06353333271933519,
        9.336185374180733e-16,
        0.0635333327193348
      ],
      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
      ],
      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 25,
      "trace_frame": 999,
      "time_s": 0.25,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
      ],
      "interior_volume_change_percent": -0.6736456345755037,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        -0.17455015390353062,
        1.8310970024199632e-15,
        0.17455015390352938
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
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      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 30,
      "trace_frame": 1199,
      "time_s": 0.3,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
        null
      ],
      "paired_faces": [
        0,
        0
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      "interior_volume_change_percent": -0.7243604671454795,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
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        2.3410735798483298e-15,
        0.21078007281311328
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
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        -0.0
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      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 35,
      "trace_frame": 1399,
      "time_s": 0.35000000000000003,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
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      ],
      "paired_faces": [
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      "interior_volume_change_percent": -0.8953141238844275,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
        -0.1105906979601032,
        1.4114706060320548e-15,
        0.11059069796010292
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
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      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 40,
      "trace_frame": 1599,
      "time_s": 0.4,
      "phase": "Knife clear",
      "face_opening_mm": [
        null,
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      ],
      "paired_faces": [
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      "interior_volume_change_percent": -0.9766304242026513,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
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        -3.513618151573394e-17,
        0.08378363882901031
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
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      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
    },
    {
      "state_frame": 45,
      "trace_frame": 1799,
      "time_s": 0.45,
      "phase": "Cut 1",
      "face_opening_mm": [
        null,
        null
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      "paired_faces": [
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      "interior_volume_change_percent": -0.9554744612732091,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
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        3.0036415741450268e-15,
        0.15141202395897055
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
        -0.0,
        -0.0,
        -0.0
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      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
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    {
      "state_frame": 50,
      "trace_frame": 1999,
      "time_s": 0.5,
      "phase": "Cut 1",
      "face_opening_mm": [
        null,
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      "paired_faces": [
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      "interior_volume_change_percent": -0.987034270822984,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
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        -1.321120424991596e-15,
        0.16018300102596514
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
      "knife_on_material_x_n": -0.0,
      "knife_on_material_n": [
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        -0.0
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      "dynamic_viscosity_pa_s": 0.0,
      "knife_material_force_n": 0.0
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    {
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      "trace_frame": 2199,
      "time_s": 0.55,
      "phase": "Cut 1",
      "face_opening_mm": [
        null,
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      "paired_faces": [
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      "interior_volume_change_percent": -1.0668087517305302,
      "inverted_tetrahedra": 0,
      "centroid_x_from_start_mm": [
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        2.5217739419292473e-15,
        0.1106185794286698
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      "centroid_x_from_probe_mm": null,
      "motion_protocol": "knife-push",
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      "knife_on_material_n": [
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    {
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      "time_s": 0.6,
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      "face_opening_mm": [
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      "centroid_x_from_probe_mm": null,
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      "knife_on_material_n": [
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        -8.527261849115214e-05
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      "centroid_x_from_probe_mm": null,
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