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  "name": "cross-scenario-physics-code-transfer",
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  "description": "A cross-scenario physics-transfer benchmark for stress-testing whether within-scenario compositionality metrics on frozen video features predict cross-scenario physical-property transfer. Contains four Kubric physics scenarios (collision, ramp, flat-drop, elasticity) totalling 1,800 scenes plus a 75-scene matched-visual low-gravity collision variant; pre-extracted frozen features for eight video and image backbones (V-JEPA 2, V-JEPA 2.1, DINOv2-S/L, CLIP ViT-L/14, MAE, SigLIP, VideoMAE); ground-truth per-object tracks; and N-shot adaptation protocols with explicit task/label mappings. Real-video evaluation uses the public Phys101 dataset; we redistribute only feature tensors extracted from it. The headline empirical finding is that high TopSim, PosDis, and causal-specificity bottleneck codes do not generalise across scenarios in the tested bottleneck protocol family. This Hugging Face repository hosts the load-bearing reviewer-inspectable subset (V-JEPA 2 collision features, all four Kubric scenario label files, full reproduction code); the remaining backbone features, scenario videos, GT tracks, and Phys101 features are prepared for an immediate post-acceptance public release.",
  "url": "https://huggingface.co/datasets/physics-code-transfer-bench/cross-scenario-physics-code-transfer",
  "version": "1.0.0",
  "license": "https://www.apache.org/licenses/LICENSE-2.0",
  "datePublished": "2026-05-05",
  "creator": {
    "@type": "Organization",
    "name": "Anonymous (NeurIPS 2026 E&D Track Submission)"
  },
  "citeAs": "Anonymous Authors. A Benchmark for Cross-Scenario Physics-Code Transfer: Compositionality Metrics on Frozen Video Features. NeurIPS 2026 Evaluations & Datasets Track (under review).",
  "isLiveDataset": false,
  "keywords": [
    "physics representation learning",
    "cross-scenario transfer",
    "compositionality metrics",
    "TopSim",
    "PosDis",
    "video foundation models",
    "V-JEPA 2",
    "frozen features",
    "benchmark",
    "Kubric",
    "Phys101",
    "negative result"
  ],
  "rai:dataCollection": "Kubric scenarios were rendered using the public Kubric simulator (Apache 2.0) with the PyBullet physics backend at 240Hz substeps. Scene parameters (mass, restitution, friction, drop-height, initial velocity) are sampled on explicit grids documented in the accompanying paper. The 75-scene low-gravity variant uses the same RNG seed as the standard-gravity collision dataset to match per-scene physics-random variables (sphere color, lighting, initial velocity, position jitter) for matched-visual analysis. Phys101 features are extracted from the publicly available Phys101 dataset (Wu et al., BMVC 2016) using the V-JEPA 2 frozen encoder; we redistribute the feature tensors, not the source video.",
  "rai:dataCollectionType": "Synthetic simulation (Kubric/PyBullet) plus derived features from public real-video dataset (Phys101).",
  "rai:dataCollectionRawData": "Raw rendered video frames at 256x256, 48 frames at 24 fps; ground-truth per-object position and finite-difference velocity from PyBullet.",
  "rai:dataCollectionTimeframe": "Rendered in 2025-2026.",
  "rai:dataAnnotationProtocol": "All labels are derived directly from the simulator's ground-truth physical state (mass, restitution, friction, drop-height, initial velocity) and binned into discrete classes (3-class union-binned restitution; 5-class mass-ratio for multi-property training; per-scenario tertile mass for Phys101). No human annotation involved.",
  "rai:dataAnnotationPlatform": "Programmatic (Python).",
  "rai:dataAnnotationAnalysis": "Class-balance and bin-boundary statistics are reported in Appendix A.7 of the paper.",
  "rai:dataAnnotationPerItemTime": "0",
  "rai:dataAnnotationDemographics": "Not applicable (synthetic data + derived features).",
  "rai:dataAnnotationTools": "Custom Python scripts; see code/ in this supplementary bundle.",
  "rai:dataAnnotatorDemographicsDescription": "No human annotators involved.",
  "rai:dataPreprocessingProtocol": "Frozen-feature pre-extraction: each scene is processed as 4 evenly-spaced frames at 256x256, with one forward pass per ViT-L-scale encoder; spatial features are mean-pooled within each tubelet/patch grid to produce (N, T=4, D) tensors per scenario per backbone. Stratified train/holdout splits use 80/20 per primary label class. N-shot target-side stratified subsampling is documented in Section 3.6 of the paper.",
  "rai:dataUseCases": "Evaluating whether within-scenario compositionality metrics (TopSim, PosDis, causal specificity) predict cross-scenario transfer of learned physics codes; benchmarking new sender architectures (slot-attention, EMA-codebook VQ, product-quantised continuous, transfer-aware objectives) on a frozen-feature substrate; stress-testing the assumption that high within-scenario metric values entail abstract reusable structure; isolating the contribution of visual versus dynamics versus scene/task-structure shift via the matched-visual transfer ladder.",
  "rai:dataLimitations": "Four Kubric scenarios with 1-2 spheres; broader scenario diversity (objects, occlusions, multi-agent) would strengthen generality. The metric-transfer sweep is collision-trained and primarily evaluated on collision -> ramp at N=192 with a partial replication on collision -> flat-drop. The n=24 correlational analysis is underpowered (widest bootstrap 95% CI [-0.58, +0.32]); the load-bearing claim is sufficiency, not non-predictiveness. Tested code families are Gumbel-Softmax, tanh-bounded continuous, and a 4-configuration VQ-VAE probe; slot-attention and EMA-codebook VQ are explicit forward directions, not tested. Phys101 per-scenario tertile binning means class boundaries differ across source and target, contributing a label-boundary shift on top of the feature-distribution shift on real video; this is documented and a global-binning diagnostic is also released.",
  "rai:dataSocialImpact": "The benchmark is intended to help researchers more honestly evaluate physics-representation methods and reduce overclaiming of compositionality from within-scenario metrics. We see no immediate negative societal impacts. The released features are derived from frozen public foundation models on synthetic and openly-licensed real-video sources; no personally identifiable information is present.",
  "rai:dataBiases": "All scenes are simulator-generated and contain no human subjects, places, or demographic information. Phys101 is a publicly released physics dataset with no personally identifiable content; we redistribute only V-JEPA 2 features extracted from it.",
  "rai:personalSensitiveInformation": "None. The dataset contains no personally identifiable information.",
  "rai:dataReleaseMaintenancePlan": "The benchmark is hosted on Hugging Face. Updates (additional backbones, additional scenarios, additional pre-extracted features) will follow semantic versioning; current release is v1.0.0. Issues and pull requests are tracked at the Hugging Face dataset repository.",
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