Research works

Geometry-enforced topological chiral fermions in amorphous chiral metals

Since the prediction and observation of topological Weyl semimetals (chiral TSMs), there have been enormous efforts to characterize further condensed matter realizations of chiral fermions. These efforts were dramatically accelerated by the subsequent discovery of a profound link...

High-Precision Differential Radial Velocities of C3PO Wide Binaries: A Test of Modified Newtonian Dynamics (MOND)

Wide-binary stars, separated by thousands of AU, reside in low-acceleration regimes where Modified Newtonian Dynamics (MOND) predicts deviation from Newtonian gravity. However, Gaia radial velocities (RVs) lack the precision to resolve the small velocity differences expected in t...

On the Lavrentiev Gap for Manifold-Valued Maps

Abstract We characterize necessary and sufficient conditions ensuring approximation by smooth maps in the Sobolev space $$W^{1,\varphi }$$ W 1 , φ between suitable compact manifolds, where the prototypical example of Young function $$\varphi $$ φ is the double-phase integrand.

Teaching, selling or both? Exploring presumed influence effects of edu-ads on parents’ mediation intent

Purpose Edu-ads represent a hybrid form of media in which an educational lesson is packaged in an ad-like, persuasive format. This study aims to investigate parents’ perceptions of the effect of edu-ads on children and their subsequent mediation intentions. Design/methodology/app...

Efficacy of Transdiagnostic Emotion‐Focused Therapy in the Treatment of Depression and Anxiety Symptoms: A Quasi‐Experimental Study

ABSTRACT Objectives This study is among the first to assess the efficacy of teletherapy‐delivered Transdiagnostic Emotion‐Focused Therapy (EFT‐T) for university students with depression and anxiety symptoms. Methods Therapy was offered in a 12–16 session format. Forty students wi...

The Next Frontier in Open Access: Transforming Library Workflows

The evolution of Open Access (OA) business models has outpaced the development of efficient and effective workflows within academic libraries. OA publishing agreements have introduced operational complexities that extend beyond financial commitments. Libraries are increasingly ab...

Directional centroid trajectories reveal shifting fire activity across Brazilian biomes

Abstract Understanding how fire activity reorganizes across space is key to interpreting long-term interactions among climate variability, land-use change, and integrated fire management in Brazil. Yet this reorganization is difficult to read directly: annual maps of millions of...

Social simulations with large language model risk Utopian illusion

Reliable simulation of human behaviour is essential for explaining, predicting, and intervening in our society. Recent advances in large language models (LLMs) have shown promise in emulating human behaviours, interactions, and decision-making, offering a powerful new lens for so...

To collapse or not to collapse: Halo evolution with self-interacting dark matter mass segregation

Surprisingly compact substructures in galaxies and galaxy clusters, as well as field halos, observed by gravitational lensing could be challenging to explain solely on the basis of collisionless dark matter (DM). To investigate such objects, recent studies have focussed on the gr...

Learning-Based Data-Assisted Port-Hamiltonian Control for Free-Floating Space Manipulators

A generic data-assisted control architecture within the port-Hamiltonian framework is proposed, introducing a physically meaningful observable that links conservative dynamics to all actuation, dissipation, and disturbance channels. A robust, model-based controller combined with...

The Composite Spectrum of QSO Absorption Line Systems in DESI DR2

Abstract We present details regarding a composite spectrum of quasar (QSO) absorption line systems. In this composite spectrum, we identify more than 70 absorption lines and observe oxygen and hydrogen emission features at a higher signal-to-noise ratio than any previous study. A...

Gradient Descent Avoids Strict Saddles with a Simple Line-Search Method Too

It is known that gradient descent (GD) on a [Formula: see text] cost function generically avoids strict saddle points when using a small, constant step size. However, no such guarantee existed for GD with a line-search method. We provide one for a modified version of the standard...

Enhanced measurements on quantum computers via the simultaneous probing of non-commuting Pauli operators

Measuring the state of quantum computers is a highly non-trivial task, with implications for virtually all quantum algorithms. A promising avenue is multi-copy schemes, where identical copies of a quantum state are measured jointly so that all Pauli operators within the considere...

Arf rings, simple singularities, and reflexive modules

Abstract In a pandemic era preprint, Dao showed two remarkable properties of Arf rings: under some mild conditions, they admit finitely many indecomposable reflexive modules up to isomorphism and every reflexive module is actually isomorphic to its own dual. In fact, the latter p...

Multi-species McKean–Vlasov dynamics in non-convex landscapes

Abstract In this paper, we study multi-species stochastic interacting particle systems and their mean-field McKean–Vlasov partial differential equations (PDEs) in non-convex landscapes. Under general assumptions on non-convex confining and interaction potentials with polynomial g...

Robust adaptive discrete-time control barrier certificate

This work develops a robust adaptive control strategy for discrete-time systems using Control Barrier Functions (CBFs) to ensure safety under parametric model uncertainty and disturbances. A key contribution of this work is establishing a barrier function certificate in discrete...

Functional Inequalities and Random Walks on Increasing Subsets of the Hypercube

Abstract. Motivated by random walks on subsets of the hypercube, we prove two discrete functional inequalities on the hypercube by the technique of induction-by-restrictions. First, we give a short, elementary proof of the Poincaré inequality on increasing subsets of the cube rec...

Electromagnetism: An intrinsic approach to Hadamard's method of descent

We present a systematic geometric framework for the dimensional reduction of classical electromagnetism based on the concept of descent along vector fields of invariance. By exploring the interplay between the Lie derivative and the Hodge star operator, we implement descent condi...

Spatial sign based direct sparse linear discriminant analysis for high dimensional data

This paper investigates the robust linear discriminant analysis (LDA) problem with elliptical distributions in high-dimensional data. We propose a robust classification method, named SSLDA, that is intended to withstand heavy-tailed distributions. We demonstrate that SSLDA achiev...

Human-like content analysis for generative AI with language-grounded sparse encoders

The rapid development of generative AI has transformed content creation, communication, and human development. However, this technology raises profound concerns in high-stakes domains, demanding rigorous methods to analyze and evaluate AI-generated content. While existing analyti...