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Why User Studies and Participant Experience Reporting Matter for VR Motion Privacy?
User studies explain VR motion privacy mechanism acceptance far better than physical deviation metrics, a study of three mechanisms finds.
The paper examines how well physical deviation predicts user acceptance of VR motion privacy mechanisms compared to user studies, testing three mechanisms at five deviation levels. User studies explain substantially more variation in mechanism acceptance, though physical deviation remains significant, and prior VR experience affects acceptance. Public VR game leaderboards expose motion recordings from hundreds of thousands of users, creating identification and profiling risks. The authors recommend combining physical deviation metrics with user studies and reporting participants' prior experience.
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Hierarchical NeRF with JAX3D for Volumetric Rendering, Novel-View Synthesis, and 3D Reconstruction
MarkTechPost tutorial implements a hierarchical NeRF in JAX using jax3d volume-rendering primitives for novel-view synthesis and 3D reconstruction.
The tutorial builds an end-to-end hierarchical Neural Radiance Field using JAX, Flax, Optax, and jax3d's volume-rendering functions (sample_along_rays, volume_rendering, sample_piecewise_constant_pdf). It implements positional encoding, skip connections, separate coarse and fine networks, and view-direction conditioning with hierarchical importance sampling. Training uses JAX JIT compilation, Adam optimization, exponential learning-rate decay, and gradient clipping. Evaluation covers PSNR, depth and opacity visualization, 360-degree rendering, and marching-cubes geometry extraction.
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Anthropic CEOs wife once asked Epstein to fund porn venture – now steers Claude
Anthropic CEO Dario Amodei's wife Cami Clark once pitched Jeffrey Epstein to fund her porn startup and now informally advises the AI lab.
A Wall Street Journal report, republished by the New York Post, details the previously low-profile past of Cami Clark, wife of Anthropic CEO Dario Amodei. Before marrying Amodei in 2022, Clark co-founded a 'luxury porn' startup called Eddice and in 2012 unsuccessfully pitched Jeffrey Epstein for investment, who declined with 'Can't do sex TV.' Clark previously dated Google co-founder Eric Schmidt for about three years and later introduced him to Amodei; Schmidt became one of Anthropic's key early investors in 2021. Though Clark holds no official role at Anthropic, she reportedly acts as Amodei's strategic adviser and networker as the company moves toward a public listing that could top $2 trillion this fall.
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ReMoMask-2: Latent Retrieval-Augmented Masked Motion Generation
ReMoMask-2 rebuilds retrieval in the generator's latent space for text-to-motion generation, achieving lowest FID on KIT-ML and SnapMoGen.
ReMoMask-2 is a retrieval-augmented text-to-motion framework that constructs its retrieval database directly in the generator's pre-quantization latent space and aligns text queries through a distilled lightweight projector, eliminating the representation gap. The framework combines Hierarchical Bidirectional Momentum contrastive learning, Semantic Spatial-Temporal Attention, and Topology Structured Masking to handle hierarchical motion structure. The retriever achieves state-of-the-art accuracy, and ReMoMask-2 attains the lowest FID on KIT-ML and SnapMoGen, with a single mask-transformer stage outperforming the previous two-stage pipeline while delivering the fastest inference.
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