Ulsan National Institute of Science and Technology

Order–Disorder Tricriticality in Symmetric A n B n Star Polymer Melts

Abstract Tricriticality usually requires tuning an additional thermodynamic parameter. Here, we show that, in symmetric AnBn star polymer melts, the arm number n itself plays this role and drives the order–disorder transition (ODT) from second order to first order. By developing...

Transient Hydrogen-Manipulated Nonequilibrium Kinetics of Abnormal Grain Growth for Single-Crystal Copper Foils

Abstract Single-crystal copper foil is a distinguished material for electrical transmission, thermal conduction, and two-dimensional material epitaxy. However, the speed of producing a large-area single-crystal copper foil by annealing polycrystalline copper is limited by slow nu...

Synergistic Regulation of High Dielectric Constant and H‐Aggregation for Efficient and Thickness‐Tolerant Organic Solar Cells

ABSTRACT While the power conversion efficiency (PCE) of organic solar cells (OSCs) has advanced rapidly, their sensitivity with respect to active layer thickness hinders industrial fabrication. Herein, a novel acceptor BMD‐6F was synthesized via molecular engineering of L8‐BO, wh...

Synergistic Regulation of High Dielectric Constant and H‐Aggregation for Efficient and Thickness‐Tolerant Organic Solar Cells

ABSTRACT While the power conversion efficiency (PCE) of organic solar cells (OSCs) has advanced rapidly, their sensitivity with respect to active layer thickness hinders industrial fabrication. Herein, a novel acceptor BMD‐6F was synthesized via molecular engineering of L8‐BO, wh...

A physics-constrained surrogate for subcooled flow boiling in low-GWP immersion cooling microchannels: FiLM conditioning and gradient-balanced training

In liquid immersion cooling with the low-GWP refrigerant R1233zd(E), the onset of nucleate boiling (ONB) governs both the wall temperature and the thermal margin. A real-time digital twin needs a fast differentiable surrogate of the boiling closure rather than repeated evaluation...

Exploring the potential of AI-driven brain–computer interfaces for Alzheimer’s disease: an integrated framework for diagnosis and therapeutic intervention

Early diagnosis and timely intervention are critical in Alzheimer's disease (AD), yet conventional assessments fail to capture longitudinal neural dynamics. Although traditional biomarker frameworks offer essential pathological insights, they remain constrained by high costs and...

Wireless Monolithic Tandem Leaf for Semi-Artificial Photosynthesis

Abstract Biocatalytic semi-artificial photosynthesis enables selective solar-to-chemical conversion by harnessing photoelectrocatalytic platforms to drive redox biocatalysis. However, the reliance of most photoelectrochemical (PEC)-based devices on transparent conductive oxides (...

Correlated electron‐nuclear dynamics based on exact factorization: Theory and real‐world applications

Abstract Exact factorization (XF) offers an explicit form of electron–nuclear correlation (ENC) in its correlated electron–nuclear equations, equivalent to the molecular Schrödinger equation, beginning with an exact separation of a full molecular wavefunction into a nuclear and a...

Assessment of occupational radiation exposure from gamma-emitting rad ionuclides in the bio-shield of Kori Unit 1 during decommissioning

The external dose to the workers of bio-shield of the Kori Unit 1 was evaluated by using the VISIPLAN 4.0 code to secure the radiation safety of its decommissioning work. In particular, radionuclide-specific activity concentration data, derived from prior MCNP simulations, were u...

Securing the sensing functionality in ISAC: KLD-based ambiguity function shaping

Abstract Integrated sensing and communication (ISAC) systems introduce a sensing-privacy vulnerability because unauthorized sensing eavesdroppers (Eve) may exploit ISAC signals for independent passive sensing. This work addresses sensing-security for orthogonal frequency-division...

Rust’s Type Checker Implementation Is Unsound: An Empirical Study on Soundness Bugs in rustc

Rust is claimed to be a type-sound language capable of preventing various undesirable behaviors, including memory bugs. However, rustc, the official Rust compiler, is not immune to defects; it contains soundness bugs, where the compiler accepts programs that should be rejected du...

Modeling and Simulation Techniques for Ultrahigh-Performance Concrete Materials and Structures

Abstract This paper presents a focused review of modeling and simulation strategies for ultrahigh-performance concrete (UHPC), emphasizing predictive capabilities, calibration demands, and multiscale consistency. Continuum damage plasticity and cap-based formulations are shown to...

Metal cofactor-level chassis engineering enables aerobic expression of tungsten formate dehydrogenases in Escherichia coli

Tungsten-dependent formate dehydrogenases are among the most active biological catalysts for carbon dioxide reduction, but their production is limited by complex metal cofactor requirements and poor compatibility with standard expression hosts. Here, we address this limitation by...

Spin Splitting Coupled Visible‐Light Driven Injection Photocurrent in Bilayer Altermagnets

ABSTRACT Altermagnets host symmetry‐protected spin splitting without net magnetization, offering a new platform for spin‐dependent transport and optical responses. Here we demonstrate that bilayer altermagnets enable efficient and tunable second‐order injection photocurrents in t...

Linker‐Locking Strategy for the Rigidification of Flexible Metal–Organic Framework: Structural Stabilization and Controlled ESIPT for H 2 O/D 2 O Sensing

ABSTRACT Controlling the photodynamics of excited‐state intramolecular proton transfer (ESIPT) fluorophores is crucial for sensing, due to their large Stokes shifts and dual emission. However, structural flexibility and solvent‐induced degradation often hinder isolating a single...

WiFi sensing for urban analytics: An open-source R toolkit

WiFi sensing passively captures the WiFi packets that smartphones broadcast, offering continuous, low-cost pedestrian monitoring. The technique has been applied to footfall estimation, transit analysis, and public space studies. However, existing implementations remain tied to in...

Depth‐to‐Areal Staging Heterogeneity Preceding Lithium Plating in Graphite Anodes Revealed by Operando Imaging

ABSTRACT Lithiation in graphite electrodes proceeds heterogeneously, yet how this heterogeneity develops in space, and how it responds to the kinetic conditions of charging, remains poorly resolved because conventional probes report only volume‐averaged behavior. Here we resolve...

Tunable nanofluidic ion gating via in situ salt precipitation-dissolution

Nanofluidic ion gating underpins both biological signal transduction and iontronic signal processing. However, a simple and reliable mechanism that functions independently of local electrochemical conditions remains unavailable, hindering interference-free integration of artifici...

Eliminating Texture‐Induced Retention of Self‐Assembled Monolayer Residues for High‐Performance Perovskite Solar Cells

Self-assembled monolayers (SAMs) constitute foundational interfacial elements in high-efficiency inverted perovskite solar cells (PSCs); however, ensuring chemical and electronic integrity across SAM-modified interfaces remains challenging. Although post-deposition solvent washin...

Investigating LLM-Powered Dissenting Minority Support in Power-Imbalanced Group Decision-Making: Counterargument and Mediation as Intervention Strategies

Minority viewpoints are often suppressed in power-imbalanced group decision-making due to social pressure to comply with the majority. To address this problem, we developed an LLM-powered dissenting minority support system that aimed to foster attention to minority views through...