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Physics Preprint PDF DOI

Mixture-aware closure of the N-phase Navier--Stokes--Cahn--Hilliard mixture model

M.F.P. ten Eikelder, A. Brunk · 2026

Diffuse-interface (phase-field) models are widely used to describe multiphase mixtures and their interfacial dynamics. In multiphase settings, however, the constitutive closure should remain meaningfu…

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Physics Preprint PDF DOI

Asymmetric freezing of a sliding droplet on an inclined surface

Sivanandan Kavuri, George Karapetsas, Chander Shekhar Sharma, Kirti Chandra Sahu · 2026

We investigate the asymmetric freezing of a liquid droplet sliding on an inclined cold surface using numerical simulations based on the lubrication approximation. The combined effects of gravity, capi…

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Physics Preprint PDF DOI

Effects of nucleon-nucleon short-range correlation and symmetry energy on the evolution of newly born magnetars

C. X. Liu, T. F. Feng, J. M. Dong · 2026

Millisecond magnetars are widely suggested as the central engines powering hydrogen-poor superluminous supernovae (SLSNe). These magnetars primarily lose huge rotational energy through gravitational w…

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AI & Data Science Preprint PDF DOI

A New Kind of Network? Review and Reference Implementation of Neural Cellular Automata

Martin Spitznagel, Janis Keuper · 2026

Stephen Wolfram proclaimed in his 2003 seminal work "A New Kind Of Science" that simple recursive programs in the form of Cellular Automata (CA) are a promising approach to replace currently used math…

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Mathematics Preprint PDF DOI

A well posed and stable canonical evaporation model problem for phase-change in two-phase flows

Jan Nordstrom · 2026

We formulate a well posed interface formulation for canonical one-dimensional evaporation two-phase model problems (the Stefan and Sucking problems) commonly used to validate production codes. We focu…

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Computer Science Preprint PDF DOI

Adversarial Co-Evolution of Malware and Detection Models: A Bilevel Optimization Perspective

Olha Jureckova, Martin Jurecek, Matous Kozak, Robert Lorencz · 2026

Machine learning-based malware detectors are increasingly vulnerable to adversarial examples. Traditional defenses, such as one-shot adversarial training, often fail against adaptive attackers who use…

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Physics Preprint PDF DOI

Quark Number Susceptibilities and Conserved Charge Fluctuations in $(2+1)$-flavor QCD with M\"obius domain-wall fermions (MDWF)

Jishnu Goswami, Yasumichi Aoki, Hidenori Fukaya, Shoji Hashimoto, Issaku Kanamori, Takashi Kaneko, Yoshifumi Nakamura, David Ward, Yu Zhang (JLQCD Collaboration) · 2026

We calculate second- and selected fourth-order conserved-charge fluctuations in $(2+1)$-flavor QCD using M\"obius domain-wall fermions (MDWF) along a line of constant physics. Gauge ensembles were gen…

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Physics Preprint PDF DOI

A Poincar\'e-covariant study of strange quark stars

Hao-Ran Zhang, Bo-Lin Li, Zhu-Fang Cui · 2026

We investigate the properties of dense quark matter and strange quark stars within a nonperturbative, Poincar\'e-covariant framework. Employing a symmetry-preserving vector$\,\otimes\,$vector contact …

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Mathematics Preprint PDF DOI

Preconditioners for the Onsager-Stefan-Maxwell equations for multicomponent diffusion

Kars Knook, Aaron Baier-Reinio, Patrick E. Farrell · 2026

The Onsager-Stefan-Maxwell (OSM) equations are an important model of mass transport in multicomponent flows with multiple chemical species. They describe the coupling of diffusive fluxes between speci…

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Economics & Finance Preprint PDF DOI

From Exposure to Adoption: Generative AI in European Workplaces

Golo Henseke · 2026

This study examines who adopts generative AI and whether early adoption has begun to reshape the task content of jobs across 35 European countries. Adoption ranges from under 3% to 25%. Occupational e…

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Physics Preprint PDF DOI

Sensing of Low-Frequency Electric Fields Using Rydberg EIT within the Fisher Information Framework

Tianyu Zhou, Haipeng Xie, Xin Wang · 2026

Rydberg atoms, which possess exceptionally large electric dipole moments, offer a promising route for electric field sensing as well as metrology traceable to the International System of Units (SI); h…

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Engineering Preprint PDF DOI

DTEA: A Dual-Topology Elastic Actuator Enabling Real-Time Switching Between Series and Parallel Compliance

Vishal Ramesh, Aman Singh, Shishir Kolathaya · 2026

Series and parallel elastic actuators offer complementary but mutually exclusive advantages, yet no existing actuator enables real-time transition between these topologies during operation. This paper…

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Computer Science Preprint PDF DOI

vstash: Local-First Hybrid Retrieval with Adaptive Fusion for LLM Agents

Jayson Steffens · 2026

We present **vstash**, a local-first document memory system that combines vector similarity search with full-text keyword matching via Reciprocal Rank Fusion (RRF) and adaptive per-query IDF weighting…

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Physics Preprint PDF DOI

Sharp-interface VOF method for phase-change simulations on unstructured meshes

Jan Kren, Bojan Niceno, Yohei Sato · 2026

Unstructured meshes are among the most versatile approaches for capturing non-canonical geometries in fluid dynamics simulations. Despite this, most high-fidelity first-principles phase-change models …

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Engineering Preprint PDF DOI

Evaluating the Exp-Minus-Log Sheffer Operator for Battery Characterization

Eymen Ipek · 2026

Odrzywolek (2026) recently introduced the Exp-Minus-Log (EML) operator eml (x, y) = exp(x) - ln(y) and proved constructively that, paired with the constant 1, it generates the entire scientific-calcul…

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AI & Data Science Preprint PDF DOI

Hardware-Efficient Neuro-Symbolic Networks with the Exp-Minus-Log Operator

Eymen Ipek · 2026

Deep neural networks (DNNs) deliver state-of-the-art accuracy on regression and classification tasks, yet two structural deficits persistently obstruct their deployment in safety-critical, resource-co…

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Physics Preprint PDF DOI

Irregularly Sampled Time Series Interpolation for Binary Evolution Simulations Using Dynamic Time Warping

Ugur Demir, Philipp M. Srivastava, Aggelos Katsaggelos, Vicky Kalogera, Santiago L. Tapia, Manuel Ballester, Shamal Lalvani, Patrick Koller, Jeff J. Andrews, Seth Gossage, Max M. Briel, Elizabeth Teng · 2026

Binary stellar evolution simulations are computationally expensive. Stellar population synthesis relies on these detailed evolution models at a fundamental level. Producing thousands of such models re…

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Mathematics Preprint PDF DOI

P\'olya's shire theorem for a class of functions with essential singularities

Christian Hagg, Boris Shapiro · 2026

We study the zero asymptotics of successive derivatives of $$f(z)=\frac{P(z)}{Q(z)}\exp\!\left(\frac{S(z)}{T(z)}\right),$$ where $P,Q,S,T\in\mathbb{C}[z]$, $\gcd(P,Q)=\gcd(S,T)=1$, and $T$ is nonconst…

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Physics Preprint PDF DOI

Quantitative analysis of fluctuating hydrodynamics in uniform shear flow

Hiroyoshi Nakano, Yuki Minami · 2026

Many theoretical predictions in fluctuating hydrodynamics under uniform shear flow have lacked precise quantitative verification due to analytical approximations whose quantitative impacts are difficu…

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Physics Preprint PDF DOI

Neutron star with dark matter using vector portal

Deepak Kumar (IISER Berhampur), Ranjita K. Mohapatra (Rajdhani College), Hiranmaya Mishra (IOP & NISER), Sudhanwa Patra (IIT Bhilai & IOP) · 2026

Compact astrophysical objects, such as neutron stars, can provide a unique environment where the interplay between strongly interacting nuclear matter and dark matter (DM) can yield possible observabl…

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