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Space-Time Coded RIS-Assisted Wireless Systems with Practical Reflection Models: Error Rate Analysis and Negative Moment-Based Optimization with Saddle Point Approximation
Tayfun Yilmaz, Haci Ilhan, Ibrahim Hokelek
https://arxiv.org/abs/2508.19129

Space-Time Coded RIS-Assisted Wireless Systems with Practical Reflection Models: Error Rate Analysis and Negative Moment-Based Optimization with Saddle Point Approximation
RIS-assisted communication has recently attracted significant attention for enhancing wireless performance in challenging environments, making accurate error analysis under practical hardware constraints crucial for future multi-antenna systems. This paper presents a theoretical framework for SER analysis of RIS-assisted multiple antenna systems employing OSTBC under practical reflection models with amplitude-dependent and quantized phase responses. By exploiting the Gramian structure of the ca…

ANO : Faster is Better in Noisy Landscape
Adrien Kegreisz
https://arxiv.org/abs/2508.18258 https://arxiv.org/pdf/2508.18258

ANO : Faster is Better in Noisy Landscape
Stochastic optimizers are central to deep learning, yet widely used methods such as Adam and Adan can degrade in non-stationary or noisy environments, partly due to their reliance on momentum-based magnitude estimates. We introduce Ano, a novel optimizer that decouples direction and magnitude: momentum is used for directional smoothing, while instantaneous gradient magnitudes determine step size. This design improves robustness to gradient noise while retaining the simplicity and efficiency of …

How Broadway is embracing large-scale, high-resolution videos and projectors as an integrated narrative tool aided by AI, as some creatives worry about overuse (Michael Paulson/New York Times)
https://www.nytimes.com/2025/06/24/theater/broadway-ai-s…

On Broadway, A.I. and High-Tech Storytelling Is Having a Moment
Videos and projections depicting an A.I.-generated actor, the digital memories of robots, a redwood forest and more: High-tech storytelling is having a moment.

Probing the electromagnetic dipole moment of the $\tau$ lepton in the $e^ e^- \to \gamma^*/Z \to \tau^ \tau^-$ reaction
Peng-Cheng Lu, Zong-Guo Si, Han Zhang
https://arxiv.org/abs/2506.19557

Probing the electromagnetic dipole moment of the $τ$ lepton in the $e^+e^- \to γ^*/Z \to τ^+ τ^-$ reaction
High-precision measurements of the lepton's electromagnetic dipole moments provide a powerful probe for testing the Standard Model. A non-zero value of the $τ$ lepton's electric(weak) dipole moment ($d_τ^γ$, $d_τ^{Z}$) would serve as a smoking gun of the new physics. On the one hand, current and future high energy colliders offer an ideal environment for such measurements. On the other hand, it is essential to investigate the optimal measurement method for extracting not only $d_τ^γ$ and …

Scaling limit of the discrete Gaussian free field with degenerate random conductances
Sebastian Andres, Martin Slowik, Anna-Lisa Sokol
https://arxiv.org/abs/2508.17369 https://

Scaling limit of the discrete Gaussian free field with degenerate random conductances
We consider discrete Gaussian free fields with ergodic random conductances on a class of random subgraphs of $\mathbb{Z}^{d}$, $d \geq 2$, including i.i.d.\ supercritical percolation clusters, where the conductances are possibly unbounded but satisfy a moment condition. As our main result, we show that, for almost every realization of the environment, the rescaled field converges in law towards a continuum Gaussian free field. We also present a scaling limit for the covariances of the field. To…

Zelensky dismantles Ukraine's anti-corruption infrastructure, brings law enforcement agencies under his thumb: https://benborges.xyz/2025/07/23/001228.html