Tootfinder

A new Timestep Criterion for the Simulation of Immiscible Two-Phase Flow with IMPES Solvers
Dominik Burr, Stefan Rief, Konrad Steiner
https://arxiv.org/abs/2510.00577 https://…

A new Timestep Criterion for the Simulation of Immiscible Two-Phase Flow with IMPES Solvers
We present an iterative IMPES solver and a novel timestep criterion for the simulation of immiscible two-phase flow involving compressible fluid phases. The novel timestep criterion uses the Courant-Friedrichs-Lewy (CFL) condition and employs numerically computed velocity derivatives to adapt the timestep size, regardless of the dominant flow characteristics. The solver combined with this timestep criterion demonstrates both efficiency and robustness across a range of flow scenarios, including …

Heptapod: Language Modeling on Visual Signals
Yongxin Zhu, Jiawei Chen, Yuanzhe Chen, Zhuo Chen, Dongya Jia, Jian Cong, Xiaobin Zhuang, Yuping Wang, Yuxuan Wang
https://arxiv.org/abs/2510.06673

Heptapod: Language Modeling on Visual Signals
We introduce Heptapod, an image autoregressive model that adheres to the foundational principles of language modeling. Heptapod employs \textbf{causal attention}, \textbf{eliminates reliance on CFG}, and \textbf{eschews the trend of semantic tokenizers}. Our key innovation is \textit{next 2D distribution prediction}: a causal Transformer with reconstruction-focused visual tokenizer, learns to predict the distribution over the entire 2D spatial grid of images at each timestep. This learning obje…

Replaced article(s) found for cs.SD. https://arxiv.org/list/cs.SD/new
[1/1]:
- TARO: Timestep-Adaptive Representation Alignment with Onset-Aware Conditioning for Synchronized V...
Tri Ton, Ji Woo Hong, Chang D. Yoo

A Stable, Accurate and Well-Conditioned Time-Domain PMCHWT Formulation
Van Chien Le, Cedric Munger, Francesco P. Andriulli, Kristof Cools
https://arxiv.org/abs/2510.07989 https:…

A Stable, Accurate and Well-Conditioned Time-Domain PMCHWT Formulation
This paper introduces a new boundary element formulation for transient electromagnetic scattering by homogeneous dielectric objects based on the time-domain PMCHWT equation. To address dense-mesh breakdown, a multiplicative Calderon preconditioner utilizing a modified static electric field integral operator is employed. Large-timestep breakdown and late-time instability are simultaneously resolved by rescaling the Helmholtz components leveraging the quasi-Helmholtz projectors and using temporal…

\`A Propos Strange Pulsations of Blue Massive Stars
Alfred Gautschy
https://arxiv.org/abs/2509.25892 https://arxiv.org/pdf/2509.25892

À Propos Strange Pulsations of Blue Massive Stars
The properties of radial nonlinear pulsations of massive blue stars are computed with the MESA software instrument in its dynamical mode. Pulsational instabilities could be computationally detected and followed if the evolutionary timestep was reduced to a fraction of the unfolding pulsation period. Stellar variability was recovered in regions on the HR plane that have been studied before and that are known to host LBVs and relatives. Mode properties are analyzed on the full stellar-evolution m…

Authentic Discrete Diffusion Model
Xiao Li, Jiaqi Zhang, Shuxiang Zhang, Tianshui Chen, Liang Lin, Guangrun Wang
https://arxiv.org/abs/2510.01047 https://a…

Authentic Discrete Diffusion Model
We propose an Authentic Discrete Diffusion (ADD) framework that fundamentally redefines prior pseudo-discrete approaches by preserving core diffusion characteristics directly in the one-hot space through a suite of coordinated mechanisms. Unlike conventional "pseudo" discrete diffusion (PDD) methods, ADD reformulates the diffusion input by directly using float-encoded one-hot class data, without relying on diffusing in the continuous latent spaces or masking policies. At its core, a timestep-co…

Improved capabilities of the TurboGAP code for radiation induced cascade simulations: an illustration with silicon
Uttiyoarnab Saha, Ali Hamedani, Miguel A. Caro, Andrea E. Sand
https://arxiv.org/abs/2509.26199

Improved capabilities of the TurboGAP code for radiation induced cascade simulations: an illustration with silicon
TurboGAP is a software package designed for efficient molecular dynamics simulations using Gaussian Approximation Potential (GAP) machine-learning interatomic potentials (MLIP). In this work, we enhance the capabilities of TurboGAP for radiation damage simulations by implementing a two-temperature molecular dynamics model, based on electron density-dependent coupling of electronic and atomic subsystems. Additionally, we implement adaptive calculation of the timestep and grouping of atoms for ce…