Tootfinder

In search of constitutive conditions in isotropic hyperelasticity: polyconvexity versus true-stress-true-strain monotonicity
Maximilian P. Wollner, Gerhard A. Holzapfel, Patrizio Neff
https://arxiv.org/abs/2509.08597

In search of constitutive conditions in isotropic hyperelasticity: polyconvexity versus true-stress-true-strain monotonicity
The polyconvexity of a strain-energy function is nowadays increasingly presented as the ultimate material stability condition for an idealized elastic response. While the mathematical merits of polyconvexity are clearly understood, its mechanical consequences have received less attention. In this contribution we contrast polyconvexity with the recently rediscovered true-stress-true-strain monotonicity (TSTS-M${}^{++}\!$) condition. By way of explicit examples, we show that neither condition by …

Temperature behavior of optical absorption spectra in HfO2 thin films
A. O. Shilov, S. S. Savchenko, A. S. Vokhmintsev, V. A. Gritsenko, I. A. Weinstein
https://arxiv.org/abs/2509.07419

Temperature behavior of optical absorption spectra in HfO2 thin films
Hafnium dioxide, also known as hafnia, is an extremely sought-after material in opto- and nanoelectronics for creating optical coatings and various functional media to have stable performance characteristics under varying thermal operating conditions. In this paper, we have investigated the behavior of the optical properties of hafnia thin films exhibiting an amorphous structure in a wide temperature range of 7-296 K. For the first time we have examined the temperature effects in the energy gap…

Strong interlayer coupling and chiral flat-band cascades in twisted bilayer gratings
Daegwang Choi, Soon-Jae Lee, Seung-Woon Cho, Chan Bin Bark, Seik Pak, Dong-Jin Shin, Moon Jip Park, Su-Hyun Gong
https://arxiv.org/abs/2510.07381

Strong interlayer coupling and chiral flat-band cascades in twisted bilayer gratings
From atomic crystals to macroscopic material structures, twisted bilayer systems have emerged as a promising route to control wave phenomena. In few-layer van der Waals (vdW) materials, however, the intrinsically weak interlayer coupling typically demands fine control of small twist angles to reach magic-angle conditions. Here, we show that one-dimensional photonic crystal bilayers can overcome this limitation by accessing a regime of strong interlayer coupling -- comparable to intralayer coupl…

"“I Don’t Think Librarians Can Save Us”: The Material Conditions of Information Literacy Instruction in the Misinformation Age"
https://crl.acrl.org/index.php/crl/article/view/26856
"This national qualitative study investigates academic librarians’ instruc…

CO Depletion in Infrared Dark Clouds
G. Cosentino (Institut de Radioastronomie Millimetrique, France, European Southern Observatory, Germany), J. C. Tan (Department of Space, Earth and Environment, Chalmers University of Technology, Sweden, Department of Astronomy, University of Virginia, USA), C. Gainey (Department of Astronomy, Yale University, USA), C. Y. Law (INAF Osservatorio Astronomico di Arcetri, Italy, Department of Space, Earth and Environment, Chalmers University of Technolo…

CO Depletion in Infrared Dark Clouds
Infrared Dark Clouds (IRDCs) are cold, dense structures representative of the initial conditions of star formation. Many studies of IRDCs employ CO to investigate cloud dynamics. However, CO can be highly depleted from the gas phase in IRDCs, impacting its fidelity as tracer. CO depletion is also of great interest in astrochemistry, since CO ice in dust grain mantles provides the raw material for forming complex organic molecules. We study CO depletion toward four IRDCs to investigate how it co…

Impact of material properties on the spectral broadening process in thin solid media
Viktor Pajer, Levente Lehotai, J\'anos Bohus, Bal\'azs Tari, Mikhail Kalashnikov, \'Ad\'am B\"orzs\"onyi, Roland S. Nagymih\'aly
https://arxiv.org/abs/2508.05071

Impact of material properties on the spectral broadening process in thin solid media
The post-compression of high peak power laser pulses can efficiently increase the peak intensity on target without the need to build additional amplification stages and enlarge the compressor optics. However, to our best knowledge, the spectral broadening of such pulses with different nonlinear media has not yet been investigated systematically. Here we performed an experimental campaign with mJ-class 25 fs pulses, where the conditions of high energy post-compression were emulated. Fused silica…

Local boundary conditions in nonlocal hyperelasticity via heterogeneous horizons
Carolin Kreisbeck, Hidde Sch\"onberger
https://arxiv.org/abs/2509.03468 https://

Local boundary conditions in nonlocal hyperelasticity via heterogeneous horizons
In this paper, we consider a class of variational problems with integral functionals involving nonlocal gradients. These models have been recently proposed as refinements of classical hyperelasticity, aiming for an effective framework to capture also discontinuous and singular material effects. Specific to our set-up is a space-dependent interaction range that vanishes at the boundary of the reference domain. This ensures that the nonlocal operator depends only on values within the domain and l…

Engineering Phonons in Compositionally Complex Carbide Ceramics
Linu Malakkal, Jarin C French, Lanh Trinh, Kaustubh K Bawane, Shuxiang Zhou, Zilong Hua, Lingfeng He, Yongfeng Lu, Bai Cui
https://arxiv.org/abs/2508.04812

Engineering Phonons in Compositionally Complex Carbide Ceramics
In the pursuit of advanced ceramic materials with exceptional irradiation-resistance and high-temperature tolerance for nuclear applications, compositionally complex carbides (CCCs) have emerged as a highly promising class of candidate materials for extreme environments. In such conditions, critical material properties such as thermal stability, elasticity, thermal conductivity and thermodynamics behavior are predominantly influenced by phonons. In CCCs, pronounced cation disorder can lead to s…

Electromagnetically driven, environmentally adaptive, and functionally switchable hydrodynamic devices
Chen-Long Wu, Bin Wang, Hao Wang, Neng-Zhi Yao, Liujun Xu, Xuesheng Wang, Jiping Huang
https://arxiv.org/abs/2509.26491

Electromagnetically driven, environmentally adaptive, and functionally switchable hydrodynamic devices
Metamaterials provide exceptional control over physical phenomena, enabling many disruptive technologies. However, researches in hydrodynamic meta-devices have mainly used intrusive methods to manipulate material structures, limited by material properties and specific environmental conditions. Each design serves a single function, reducing versatility. This study introduces a meta-hydrodynamics theory using applied force fields to avoid physical contact with the fluid and eliminate the need for…

Physics-Informed Kolmogorov-Arnold Networks for multi-material elasticity problems in electronic packaging
Yanpeng Gong, Yida He, Yue Mei, Xiaoying Zhuang, Fei Qin, Timon Rabczuk
https://arxiv.org/abs/2508.16999

Physics-Informed Kolmogorov-Arnold Networks for multi-material elasticity problems in electronic packaging
This paper proposes a Physics-Informed Kolmogorov-Arnold Network (PIKAN) method for analyzing elasticity problems in electronic packaging multi-material structures. The core innovation lies in replacing Multi-Layer Perceptrons (MLPs) with Kolmogorov-Arnold Networks (KANs) within the energy-based Physics-Informed Neural Networks (PINNs) framework. The method constructs admissible displacement fields that automatically satisfy essential boundary conditions and employs various numerical integratio…

Gyrotropy-Induced Symmetry Breaking of Erosion Hot Spots on Antenna Limiters during High-Power Tokamak RF Operation: Mechanisms and Mitigation Strategies
W. Tierens, A. Kumar, J. Lore, G. Urbanczyk, R. Diab, The WEST Team
https://arxiv.org/abs/2508.02445

Gyrotropy-Induced Symmetry Breaking of Erosion Hot Spots on Antenna Limiters during High-Power Tokamak RF Operation: Mechanisms and Mitigation Strategies
Ion Cyclotron Range of Frequencies heating (ICRH) and current drive will be essential for sustaining high-performance plasmas in next-generation fusion devices (e.g. ITER, SPARC). ICRH actuators routinely produce localized hot spots on limiters and nearby components, posing serious risks to antenna reliability, material survivability, and overall plasma performance. Remarkably, these hot spots are often strongly asymmetric, even with nominally symmetric plasma conditions and antenna geometries.…

Hyperspectral Adapter for Semantic Segmentation with Vision Foundation Models
JuanaJuana Valeria Hurtado, Rohit Mohan, Abhinav Valada
https://arxiv.org/abs/2509.20107 https://…

Hyperspectral Adapter for Semantic Segmentation with Vision Foundation Models
Hyperspectral imaging (HSI) captures spatial information along with dense spectral measurements across numerous narrow wavelength bands. This rich spectral content has the potential to facilitate robust robotic perception, particularly in environments with complex material compositions, varying illumination, or other visually challenging conditions. However, current HSI semantic segmentation methods underperform due to their reliance on architectures and learning frameworks optimized for RGB in…

Three prerequisites for high-temperature superconductivity in t-PtBi$_2$
Andrii Kuibarov, Susmita Changdar, Riccardo Vocaturo, Oleksandr Suvorov, Alexander Fedorov, Rui Lou, Maxim Krivenkov, Luminita Harnagea, Sabine Wurmehl, Jeroen van den Brink, Bernd B\"uchner, Sergey Borisenko
https://arxiv.org/abs/2509.02178

Three prerequisites for high-temperature superconductivity in t-PtBi$_2$
Although the generic mechanism behind high-temperature superconductivity remains notoriously elusive, a set of favorable conditions for its occurrence in a given material has emerged: (i) the electronic structure should have a very high density of states near the Fermi level; (ii) electrons need to be susceptible to a sizable interaction with another degree of freedom to ensure pairing themselves; (iii) the ability to fine-tune some of the system properties significantly helps maximising the cr…

Self-organized adaptive branching in frangible matter
P. L. B. Fischer, J. Tauber, T. Koch, L. Mahadevan
https://arxiv.org/abs/2509.26101 https://arxiv.org…

Self-organized adaptive branching in frangible matter
Soft and frangible materials that remodel under flow can give rise to branched patterns shaped by material properties, boundary conditions, and the time scales of forcing. We present a general theoretical framework for emergent branching in these frangible (or threshold) materials that switch abruptly from resisting flow to permitting flow once local stresses exceed a threshold, relevant for ex- amples as varied as dielectric breakdown of insulators and the erosion of soft materials. Simulation…

Learning coupled Allen-Cahn and Cahn-Hilliard phase-field equations using Physics-informed neural operator(PINO)
Gaijinliu Gangmei, Santu Rana, Bernard Rolfe, Kishalay Mitra, Saswata Bhattacharyya
https://arxiv.org/abs/2507.18731

Learning coupled Allen-Cahn and Cahn-Hilliard phase-field equations using Physics-informed neural operator(PINO)
Phase-field equations, mostly solved numerically, are known for capturing the mesoscale microstructural evolution of a material. However, such numerical solvers are computationally expensive as it needs to generate fine mesh systems to solve the complex Partial Differential Equations(PDEs) with good accuracy. Therefore, we propose an alternative approach of predicting the microstructural evolution subjected to periodic boundary conditions using Physics informed Neural Operators (PINOs). In th…

Heterogeneity drives plasmid maintenance in large microbial communities
Johannes Nautaa, Kaitlin A. Schaal, Ying-Jie Wang, James P. J. Hall, Shai Pilosof, Manlio De Domenico
https://arxiv.org/abs/2509.01695

Heterogeneity drives plasmid maintenance in large microbial communities
Microbiomes are complex systems comprised of many interacting species. Species can survive harsh or changing conditions by rapid adaptation, a process accelerated by the exchange of genetic material between different species through horizontal gene transfer. Conjugative plasmids are ubiquitous mobile genetic elements that mediate such exchanges both within and between species. Therefore, predicting whether a plasmid can invade and be maintained by a microbial community is critical, for example …

Unveiling ZIF-8 nucleation mechanisms through molecular simulation: role of temperature, solvent and reactant concentration
Sahar Andarzi Gargari (Sorbonne Universit\'e, CNRS, Physico-chimie des Electrolytes et Nanosyst\`emes Interfaciaux, PHENIX, Paris, France), Rocio Semino (Sorbonne Universit\'e, CNRS, Physico-chimie des Electrolytes et Nanosyst\`emes Interfaciaux, PHENIX, Paris, France)

Unveiling ZIF-8 nucleation mechanisms through molecular simulation: role of temperature, solvent and reactant concentration
Synthesizing new metal-organic frameworks (MOFs) is a challenging task, as the size, morphology, polymorph and type and number of defects present on the synthesis product may depend on many variables, including temperature, solvent, concentration and nature of reactants, among others. A deeper understanding on how synthesis conditions determine the obtained material is crucial to optimize the use of resources when synthesizing new MOFs. In this contribution, we study the impact of changing conc…

SN2023syz and SN2025cbj: Two Type IIn Supernovae Associated with IceCube High-energy Neutrinos
Ming-Xuan Lu, Yun-Feng Liang, Xiang-Gao Wang, Hao-Qiang Zhang
https://arxiv.org/abs/2508.19080

SN2023syz and SN2025cbj: Two Type IIn Supernovae Associated with IceCube High-energy Neutrinos
Type IIn supernovae (SNe IIn) are a subclass of core-collapse SNe in which strong interactions occur between the ejecta and dense circumstellar material, creating ideal conditions for the production of high-energy neutrinos. This makes them promising candidate sources of neutrinos. In this work, we conduct an association study between 163 SNe IIn observed by the Zwicky Transient Facility and 138 neutrino alert events detected by the IceCube neutrino observatory. After excluding alerts with poor…

Gas and dust dynamics in $\gamma$ Cephei-type disks
Francesco Marzari, Gennaro D'Angelo
https://arxiv.org/abs/2508.18128 https://arxiv.org/pdf/2508.181…

Gas and dust dynamics in $γ$ Cephei-type disks
(Abridged) Giant planets are observed orbiting the primary stars of close binary systems. Such planets may have formed in compact circumprimary disks, under conditions much different than those around single stars. To quantify the effects of the strong gravitational perturbations exerted on circumprimary disk material, the 3D dynamics of gas and dust in orbit around the primary star of a compact and eccentric binary was modeled by using gamma Cephei as a representative of a class of close binar…

Tunable quantum anomalous Hall effect in fullerene monolayers
Leonard Werner Pingen, Jiaqi Wu, Bo Peng
https://arxiv.org/abs/2508.19849 https://arxiv.org/p…

Tunable quantum anomalous Hall effect in fullerene monolayers
Nearly four decades after its theoretical prediction, the search for material realizations of quantum anomalous Hall effect (QAHE) remains a highly active field of research. Many materials have been predicted to exhibit quantum anomalous Hall (QAH) physics under feasible conditions but the experimental verification remains widely elusive. In this work, we propose an alternative approach towards QAH materials design by engineering customized molecular building blocks. We demonstrate this ansatz …

Enhancing the Efficiency of Time-Dependent Density Functional Theory Calculations of Dynamic Response Properties
Zhandos A. Moldabekov, Sebastian Schwalbe, Uwe Hernandez Acosta, Thomas Gawne, Jan Vorberger, Michele Pavanello, Tobias Dornheim
https://arxiv.org/abs/2510.01875

Enhancing the Efficiency of Time-Dependent Density Functional Theory Calculations of Dynamic Response Properties
X-ray Thomson scattering (XRTS) constitutes an essential technique for diagnosing material properties under extreme conditions, such as high pressures and intense laser heating. Time-dependent density functional theory (TDDFT) is one of the most accurate available ab initio methods for modeling XRTS spectra, as well as a host of other dynamic material properties. However, strong thermal excitations, along with the need to account for variations in temperature and density as well as the finite s…

Characterization of Lateral Amorphous Selenium Photodetectors for Low-Photon and VUV Detection at Cryogenic Temperatures
M. Rooks, S. Abbaszadeh, J. Asaadi, V. A. Chirayath, M. Febbraro, M. \'A. Garc\'ia-Peris, E. Gramellini, K. Hellier, B. Sudarsan, I. Tzoka
https://arxiv.org/abs/2507.18497

Characterization of Lateral Amorphous Selenium Photodetectors for Low-Photon and VUV Detection at Cryogenic Temperatures
The performance of amorphous selenium (a-Se) as a cryogenic photodetector material is evaluated through a series of experiments using laterally structured devices operated in a custom optical test stand. These studies investigate the response of a-Se detectors to low-photon fluxes at high electric fields near avalanche conditions, the linearity of the photoconductive response over a wide dynamic range and the direct detection of narrowband 130 nm vacuum ultraviolet (VUV) illumination. At 87 K, …

Temperature-Dependent Evolution of Coherence, Entropy, and Photon Statistics in Photoluminescence
Tomer Bar Lev, Carmel Rotschild
https://arxiv.org/abs/2508.01953 https://

Temperature-Dependent Evolution of Coherence, Entropy, and Photon Statistics in Photoluminescence
Photoluminescence (PL) is a fundamental light-matter interaction in which absorbed photons are re-emitted, playing a key role in science and engineering. It is commonly modeled by introducing a non-zero chemical potential into Planck's law to capture its deviation from thermal emission. In this work, we establish, for the first time to our knowledge, a fundamental relationship that expresses the chemical potential as a function of temperature, material properties, and excitation conditions, ena…

Bridging Molecular Simulation and Process Modeling for Predictive Multicomponent Adsorption
Sunghyun Yoon, Jui Tu, Li-Chiang Lin, Yongchul G. Chung
https://arxiv.org/abs/2508.12200

Bridging Molecular Simulation and Process Modeling for Predictive Multicomponent Adsorption
Accurate and efficient prediction of multicomponent adsorption equilibria across pressures, temperatures, and compositions remain a central challenge for designing energy-efficient adsorption-based separation processes. Traditional approaches, including model fitting and ideal adsorbed solution theory (IAST), often fail to balance accuracy, computational efficiency, and transferability under process-relevant conditions. Here, we introduce a material-to-process modeling framework that integrates…

Refraction laws in temporal media
Cristian E. Guti\'errez, Eric Stachura
https://arxiv.org/abs/2507.20032 https://arxiv.org/pdf/2507.20032

Refraction laws in temporal media
We consider the time dependent Maxwell system in the sense of distributions in the context of temporal interfaces. Just as with spatial interfaces, electromagnetic waves at temporal interfaces scatter and create a transmitted and reflected wave. We provide a rigorous derivation of boundary conditions for the electric and magnetic fields at temporal interfaces with precise assumptions on the material parameters. In turn, we use this to obtain a general Snell's Law at such interfaces. From this, …

Particle-scale studies elucidating visco-collisional rheology in granular-fluid flows
Teng Man, Herbert Huppert, Qingfeng Feng, Kimberly Hill
https://arxiv.org/abs/2509.20700 ht…

Particle-scale studies elucidating visco-collisional rheology in granular-fluid flows
We study the particle-scale dynamics that give rise to bulk flow behaviours of highly concentrated particle-fluid mixtures using discrete element method (DEM) simulations. We utilize boundary conditions of a stress-controlled shear cell and vary material properties and applied stresses systematically. We find the bulk rheology transitions smoothly among what might be called viscous, collisional, and visco-collisional behaviours based on average shear rate dependence as well as dominance of loca…

A novel finite element method for simulating surface plasmon polaritons on complex graphene sheets
Jichun Li, Michael Neunteufel, Li Zhu
https://arxiv.org/abs/2507.17928 https:/…

A novel finite element method for simulating surface plasmon polaritons on complex graphene sheets
Surface plasmon polaritons (SPPs) are generated on the graphene surface, and provide a window into the nano-optical and electrodynamic response of their host material and its dielectric environment. An accurate simulation of SPPs presents several unique challenges, since SPPs often occur at complex interfaces between materials of different dielectric constants and appropriate boundary conditions at the graphene interfaces are crucial. Here we develop a simplified graphene model and propose a ne…

A rigorous coupled-wave analysis of birefringent holographic gratings with periodically-modulated dielectric tensor along an in-plane direction and tensor variations in the thickness direction
Masud Mansuripur, Per Kristen Jakobsen
https://arxiv.org/abs/2510.01214

A rigorous coupled-wave analysis of birefringent holographic gratings with periodically-modulated dielectric tensor along an in-plane direction and tensor variations in the thickness direction
Diffraction of light upon interaction with thick slabs of a dielectric material having a periodic modulation of its refractive index (or dielectric tensor) is typically studied with the aid of the method known as the rigorous coupled-wave analysis (RCWA). The method involves solving Maxwell's equations for a large number of coupled electromagnetic plane-waves inside the dielectric slab, then matching the boundary conditions at the interface between the incidence medium and the slab, as well as …

Missing Physics Discovery through Fully Differentiable Finite Element-Based Machine Learning
Ado Farsi, Nacime Bouziani, David A Ham
https://arxiv.org/abs/2507.15787 https://

Missing Physics Discovery through Fully Differentiable Finite Element-Based Machine Learning
Although many problems in science and engineering are modelled by well-established PDEs, they often involve unknown or incomplete relationships, such as material constitutive laws or thermal response, that limit accuracy and generality. Existing surrogate-modelling approaches directly approximate PDE solutions but remain tied to a specific geometry, boundary conditions, and set of physical constraints. To address these limitations, we introduce a fully differentiable finite element-based machin…

Detection of CH3 in the O-rich planetary nebula NGC 6302
Charmi Bhatt (Department of Physics and Astronomy, University of Western Ontario, Institute for Earth and Space Exploration, University of Western Ontario), Jan Cami (Department of Physics and Astronomy, University of Western Ontario, SETI Institute), Els Peeters (Department of Physics and Astronomy, University of Western Ontario, SETI Institute), Nicholas Clark (Department of Physics and Astronomy, University of Western Ontario…

Detection of CH3+ in the O-rich planetary nebula NGC 6302
Planetary nebulae are sites where ejected stellar material evolves into complex molecules, but the precise physical conditions and chemical routes that govern these processes are unclear. The presence of abundant carbon-rich molecules in O-rich environments poses particular challenges. Here we report the first detection of methyl cation (CH3+) in any planetary nebula, observed in the O-rich nebula NGC 6302 using JWST MIRI/MRS observations. CH3+ is a key driver of organic chemistry in UV-irradia…

On the asymptotic properties of solutions to a nonlinear transmission problem for a Bresse beam with thermal damping
Tamara Fastovska, Dirk Langemann
https://arxiv.org/abs/2507.19297

On the asymptotic properties of solutions to a nonlinear transmission problem for a Bresse beam with thermal damping
A nonlinear transmission problem for an arch beam, which consists of two parts with different material properties is considered. One of the parts is subjected to thermal damping while another one is undamped. The thermal damping affects only the shear angle and the longitudinal equation within the damped part, which can have any positive length. We prove the well-posedness of the system in the energy space and establish the existence of a compact global attractor under certain conditions impose…

Predicting Trends in $V_{OC}$ Through Rapid, Multimodal Characterization of State-of-the-Art p-i-n Perovskite Devices
Amy E. Louks, Brandon T. Motes, Anthony T. Troupe, Axel F. Palmstrom, Joseph J. Berry, Dane W. deQuilettes
https://arxiv.org/abs/2508.21037

Predicting Trends in $V_{OC}$ Through Rapid, Multimodal Characterization of State-of-the-Art p-i-n Perovskite Devices
Perovskite photovoltaic technologies are approaching commercial deployment, yet single junction and tandem architectures both still have significant room to improve power conversion efficiency and stability. The ability to perform rapid screening of material quality after altering processing conditions is critical to accelerating the optimization and commercialization of perovskite-based technologies. Currently, researchers utilize a wide range of stand-alone metrology tools to isolate sources …

Data-driven discovery of governing equation for sheared granular materials in steady and transient states
Xu Han, Lu Jing, Chung-Yee Kwok, Gengchao Yang, Yuri Dumaresq Sobral
https://arxiv.org/abs/2509.14518

Data-driven discovery of governing equation for sheared granular materials in steady and transient states
Granular material has significant implications for industrial and geophysical processes. A long-lasting challenge, however, is seeking a unified rheology for its solid- and liquid-like behaviors under quasi-static, inertial, and even unsteady shear conditions. Here, we present a data-driven framework to discover the hidden governing equation of sheared granular materials. The framework, PINNSR-DA, addresses noisy discrete particle data via physics-informed neural networks with sparse regression…

Avalanche-like lithium intercalation and intraparticle correlations in graphite
Jiho Han, George S. Phillips, Alice J. Merryweather, Juhwan Lim, Christoph Schnedermann, Robert L. Jack, Clare P. Grey, Akshay Rao
https://arxiv.org/abs/2509.21047

Avalanche-like lithium intercalation and intraparticle correlations in graphite
Graphite is the most widely used anode material in lithium-ion batteries with over 98% market share. However, despite its first application over 30 years ago, the lithium insertion processes and associated dynamics in graphite remain poorly understood, especially for the dilute stages. A fundamental understanding of how the symmetry-breaking phase transitions occur pseudo-continuously under operating conditions is still lacking. Here, we provide a unified picture of ion intercalation dynamics d…

A Chebyshev--Ritz Spectral Framework for Nonlinear Vibration of CNT-Reinforced Composite Beams
Maryam Jalili, Samad Noeiaghdam
https://arxiv.org/abs/2509.11946 https://

A Chebyshev--Ritz Spectral Framework for Nonlinear Vibration of CNT-Reinforced Composite Beams
This study develops a spectral Ritz formulation for the nonlinear free vibration analysis of carbon nanotube-reinforced composite (CNTRC) beams. Boundary-adapted Chebyshev basis functions are constructed to exactly satisfy clamped and simply supported boundary conditions. The governing equations incorporate von~Kármán geometric nonlinearity, while the effective material properties for both uniform and functionally graded (FG) CNT distributions are evaluated using a modified rule of mixtures. …

Non-isentropic cavity flow for the multi-d compressible Euler system
Helge Kristian Jenssen, Charis Tsikkou
https://arxiv.org/abs/2509.16435 https://arxiv.…

Non-isentropic cavity flow for the multi-d compressible Euler system
We rigorously construct non-isentropic and self-similar multi-d Euler flows in which a central cavity (vacuum region) collapses. While isentropic flows of this type have been analyzed earlier by Hunter \cite{hun_60} and others, the non-isentropic setting introduces additional complications, in particular with respect to the behavior along the fluid-vacuum interface. The flows we construct satisfy the physical boundary conditions: the interface is a material surface along which the pressure vani…

UV-irradiated outflows from low-mass protostars in Ophiuchus with JWST/MIRI
I. M. Skretas, A. Karska, L. Francis, W. R. M. Rocha, M. L. van Gelder, {\L}. Tychoniec, M. Figueira, M. Sewi{\l}o, F. Wyrowski, P. Schilke
https://arxiv.org/abs/2509.10256

UV-irradiated outflows from low-mass protostars in Ophiuchus with JWST/MIRI
The main accretion phase of protostars is characterized by the ejection of material in the form of jets/outflows. External UV irradiation can potentially have a significant impact on the excitation conditions within these outflows. High-resolution observations in the mid-infrared allow us to investigate the details of those energetic processes through the emission of shock-excited H$_2$ . Our aim is to spatially resolve H$_2$ and ionic/atomic emission within the outflows of low-mass protostars,…

Mapping Microstructure: Manifold Construction for Accelerated Materials Exploration
Simon A. Mason, Megna N. Shah, Jeffrey P. Simmons, Dennis M. Dimiduk, Stephen R. Niezgoda
https://arxiv.org/abs/2509.15022

Mapping Microstructure: Manifold Construction for Accelerated Materials Exploration
Accelerating materials development requires quantitative linkages between processing, microstructure, and properties. In this work, we introduce a framework for mapping microstructure onto a low-dimensional material manifold that is parametrized by processing conditions. A key innovation is treating microstructure as a stochastic process, defined as a distribution of microstructural instances rather than a single image, enabling the extraction of material state descriptors that capture the esse…

Extreme Thermal Insulation in Nano-Bubble Wrap Materials
Amalya C. Johnson, Sorren Warkander, Archana Raja, Fang Liu
https://arxiv.org/abs/2507.12685 https…

Extreme Thermal Insulation in Nano-Bubble Wrap Materials
Achieving ultra-low thermal conductivity under ambient conditions is a fundamental challenge constrained by classical heat transport limits and material design trade-offs. Here, we introduce a new class of nano-bubble wrap architectures that achieve exceptionally low thermal conductivity by integrating nanoscale gas confinement with atomically thin, weakly coupled van der Waals solids. Using scalable patterning of 2D monolayers into periodic nano-bubbles and nano-wrinkles, we construct material…