Tootfinder

Quantum Dynamics and Elementary Excitations in Superfluid He4 Films at Low Temperatures
Vladimir I. Kruglov, Houria Triki
https://arxiv.org/abs/2509.09137 https://

Quantum Dynamics and Elementary Excitations in Superfluid He4 Films at Low Temperatures
We have formulated a novel quantum nonlinear Schrodinger equation describing of superfluid He4 in films at low temperatures. It is shown that in classical limit the found nonlinear Schrodinger equation reduces to a system of equations which are equivalent to Boussinesq equations describing the propagation of long gravity waves in incompressible fluids. This nonlinear Schrodinger equation leads to phonon-roton dispersion relation for elementary excitations in superfluid He4 films at low …

China’s CO2 emissions have now been flat or falling for 18 months.
The rapid adoption of electric vehicles (EVs) saw CO2 emissions from transport fuel drop by 5% year-on-year, while there were also declines from cement and steel production.
While emissions from the power sector were flat year-on-year, a big rise in the chemical industry’s CO2 output offset reductions elsewhere.

Analysis: China’s CO2 emissions have now been flat or falling for 18 months - Carbon Brief
China’s carbon dioxide (CO2) emissions were unchanged from a year earlier in the third quarter of 2025, extending a flat or falling trend that started in March 2024.

A profile of Polymarket CEO Shayne Coplan, whose estimated 11% stake is now worth $1B following ICE's $2B investment, as its rivalry with Kalshi intensifies (Forbes)
https://www.forbes.com/sites/aliciap…

Crypto’s Fastest-Growing Startup Mints World’s Youngest Self-Made Billionaire
A $2 billion investment from NYSE parent ICE vaults Polymarket’s 27 year-old founder Shayne Coplan into the three-comma club and intensifies its rivalry with prediction market competitor Kalshi.

Observation Matrix Design for Densifying MIMO Channel Estimation via 2D Ice Filling
Zijian Zhang, Mingyao Cui
https://arxiv.org/abs/2510.08887 https://arxi…

Observation Matrix Design for Densifying MIMO Channel Estimation via 2D Ice Filling
In recent years, densifying multiple-input multiple-output (MIMO) has attracted much attention from the communication community. Thanks to the subwavelength antenna spacing, the strong correlations among densifying antennas provide sufficient prior knowledge about channel state information (CSI). This inspires the careful design of observation matrices (e.g., transmit precoders and receive combiners), that exploits the CSI prior knowledge, to boost channel estimation performance. Aligned with t…

I got in a nice 7km run tonight, feeling better after having had a cold. Did the first 30 min or so in HR zone 2, then got irritated with the pace and decided to go a little faster for the last half hour. That might be the plan going forward. I believe in the expanded fitness levels that zone 2 builds, but it suuuucks!
Dedicating this run to my friend @…, wishing hi…

🍆 A Hermetic, Transparent Soft Growing Vine Robot System for Pipe Inspection
#robots #machine

A Hermetic, Transparent Soft Growing Vine Robot System for Pipe Inspection
Rehabilitation of aging pipes requires accurate condition assessment and mapping far into the pipe interiors. Soft growing vine robot systems are particularly promising for navigating confined, sinuous paths such as in pipes, but are currently limited by complex subsystems and a lack of validation in real-world industrial settings. In this paper, we introduce the concept and implementation of a hermetic and transparent vine robot system for visual condition assessment and mapping within non-bra…

Comprehensive Mapping of Tracer Diffusivities Across Composition Space in Ternary NiAlTi and Quinary NiCoFeAlTi High-Entropy Alloy Using Diffusion Couple Experiments and Physics Informed Neural Network Inversion
Ismail Kamil Worke, Suman Sadhu, Saswata Bhattacharyya, Aloke Paul
https://arxiv.org/abs/2509.09486

Comprehensive Mapping of Tracer Diffusivities Across Composition Space in Ternary NiAlTi and Quinary NiCoFeAlTi High-Entropy Alloy Using Diffusion Couple Experiments and Physics Informed Neural Network Inversion
A comprehensive experimental and physics informed neural network numerical inverse diffusion analysis is conducted in technologically important NiAlTi ternary and NiCoFeAlTi quinary solid solutions for estimating and extracting composition dependent diffusion coefficients. A systematic variation of tracer, intrinsic and interdiffusion coefficients with composition could be estimated in the ternary solid solution. Following, the possibility of producing Al Ti constant PB diffusion profiles keepi…

Securing Cryptographic Software via Typed Assembly Language (Extended Version)
Shixin Song, Tingzhen Dong, Kosi Nwabueze, Julian Zanders, Andres Erbsen, Adam Chlipala, Mengjia Yan
https://arxiv.org/abs/2509.08727

Securing Cryptographic Software via Typed Assembly Language (Extended Version)
Authors of cryptographic software are well aware that their code should not leak secrets through its timing behavior, and, until 2018, they believed that following industry-standard constant-time coding guidelines was sufficient. However, the revelation of the Spectre family of speculative execution attacks injected new complexities. To block speculative attacks, prior work has proposed annotating the program's source code to mark secret data, with hardware using this information to decide wh…

A class of Truncated Freud polynomials
Juan Carlos Garc\'ia-Ardila, Francisco Marcell\'an, Misael E. Marriaga
https://arxiv.org/abs/2510.09214 https://

A class of Truncated Freud polynomials
Consider the following truncated Freud linear functional $\mathbf{u}_z$ depending on a parameter $z$, $$\langle\mathbf{u}_z,p\rangle=\int_0^\infty p(x)e^{-zx^4}dx,\quad z>0.$$ The aim of this work is to analyze the properties of the sequence of orthogonal polynomials $(P_n)_{n\geq 0}$ with respect to $\mathbf{u}_z$. Such a linear functional is semiclassical and, as a consequence, we get the system of nonlinear difference equations (Laguerre-Freud equations) that the coefficients of the three-te…

Matrix-valued bispectral discrete orthogonal polynomials
I. Bono Parisi
https://arxiv.org/abs/2509.08909 https://arxiv.org/pdf/2509.08909

Matrix-valued bispectral discrete orthogonal polynomials
We develop a unified construction of matrix-valued orthogonal polynomials associated with discrete weights, yielding bispectral sequences as eigenfunctions of second-order difference operators. This general framework extends the discrete families in the classical Askey scheme to the matrix setting by producing explicit matrix analogues of the Krawtchouk, Hahn, Meixner, and Charlier polynomials. In particular, we provide the first matrix extensions of the Krawtchouk and Hahn polynomials, filling…