Tohoku University

Attention-Like Hebbian Learning from Quantum Probability Flow and Quantum-Annealer Tests

We propose a quantum probability-flow principle for deriving local learning rules in associative memory. A transverse field defines leakage channels from data states, and minimizing the measured survival loss gives stability-driven updates. For imaginary-time, dephased dynamics,...

Comparative Analysis of Ion and Electron Contributions to Ionospheric Ionization at Auroral and Subauroral Latitudes

Abstract Electron and proton precipitation into the nightside ionosphere is a key process in magnetosphere–ionosphere coupling. Although auroral electron precipitation at –10 keV is traditionally considered the main driver of auroral emissions, recent studies show that keV electr...

Viscoelastic Response of Crosslinked Rubber: Coarse‐Grained Molecular Dynamics and Time‐Temperature Superposition

ABSTRACT The viscoelastic response of crosslinked rubber was investigated using coarse‐grained molecular dynamics simulations combined with time‐temperature superposition. Crosslinked polymer networks containing different numbers of crosslinkers were generated using a dynamic rea...

Unscanning by Möbius Inversion (Functional Pearl)

This pearl presents the classical Möbius inversion theorem for posets as a calculation method for inverting scan-like cumulative computations. We model a scan function as summation over principal down-sets of a lower-finite poset: local values are accumulated according to the ord...

Engineering Hidden Ferroelectric‐Like Distortion for Ultralow Thermal Conductivity in Polar van der Waals Tetradymite

ABSTRACT Ferroelectric‐like polar structures enable diverse functionalities through coupling with charge and phonon transport. Although effective in modulating thermal conductivity, the rational design of novel polar materials with intrinsically low thermal conductivity via ferro...

Type-II Charge-Transfer Photogating in a DDCI-4/MoS2 Heterojunction Phototransistor

Abstract Molecular sensitization of two-dimensional semiconductors offers a route to enhanced photodetection, yet the interfacial charge-transfer mechanisms that govern gain in these hybrid devices are often inferred rather than directly established. Here, we report a multilayer...

Empowering PolymericMaterials Discovery by ArtificialIntelligence

Abstract Polymeric materials underpin modern technologies spanning energy storage, microelectronics, healthcare and sustainable manufacturing. Yet their rational design remains exceptionally challenging because material performance emerges from complex interactions among molecula...

Building a Physics-Aware AI Ecosystem for Solid-State Hydrogen Storage Materials

Abstract Hydrogen storage remains a central bottleneck for scalable hydrogen energy systems due to the multiscale and coupled nature of the thermodynamics, kinetics, and microstructural evolution of hydrogen storage materials (HSMs). Although artificial intelligence (AI) has acce...

Posttraumatic Stress Dynamics and 15-Year Persistence in Great East Japan Earthquake Survivors

Importance Long-term persistence of posttraumatic stress reactions (PTSRs) is a major public health challenge, yet early prognostic markers for decadal outcomes remain poorly characterized. Specifically, the importance of early symptom fluctuations compared with initial cross-sec...

An orbifold framework for classifying layer groups with an application to knitted fabrics

Abstract Entangled structures, such as textiles and architected materials, are often doubly periodic. Owing to this property and their finite transverse thickness, the symmetries of these materials are described by the crystallographic layer groups. While orbifold notation provid...

Anterior cingulate cortex projections to the amygdala in primates: topographic and layer-specific organization underlying emotion and mood regulation

Abstract Emotion and mood regulation critically depends on interactions between the anterior cingulate cortex (ACC) and the amygdala. However, the detailed architecture of ACC projections to their major targets, the basal (BA) and accessory (AcBA) basal nuclei of the amygdala, re...

The Clinicopathological Characteristics and Prognosis of Cholangiolocarcinoma: A Multicenter Study With a Central Pathology Review

BACKGROUND: Cholangiolocarcinoma (CLC) is a rare liver cancer with ≥ 80% ductular configuration (DC). Given its rarity, its clinicopathological characteristics remain poorly understood, and its status as a distinct disease entity remains controversial. We conducted a nationwide m...

Band‐Selective, Low‐Dispersion Terahertz Attenuators Based on 3D Bulk Metamaterials Leveraging De‐latticed Cross‐Bar Resonator Ensembles

ABSTRACT Terahertz (THz) optical components for power attenuation and dispersion management require materials that provide isotropic and band‐selective control of electromagnetic waves. However, two‐dimensional (2D) metasurfaces based on coherent lattice coupling exhibit polariza...

Photoinduced Switching-onof Intermolecular FerromagneticExchange in a Cobalt–Viologen Donor–Acceptor Assembly

Abstract Crystal engineering of anisotropic molecular solids that translate photoinduced charge transfer into switchable magnetic exchange offers a route to optically addressable exchange-correlated magnetic states. Here, we show that (MV)[Co(pdms)2](MeOH)2(MeCN), a donor–accepto...

Middle atmosphere chemical and dynamical effects in the CCMI-2022 stratospheric aerosol injection scenario

Abstract. Stratospheric aerosol injection (SAI) could slow surface warming, however, potential side effects include changes in stratospheric ozone and changes in regional surface temperatures and precipitation resulting from tropical lower stratospheric warming. Previous multi-mo...

Wide-field magnetic imaging of shielding-current-driven vortex rearrangement under local heating using diamond quantum sensors

Understanding and controlling vortex motion in superconductors are important both for suppressing dissipation in superconducting devices and for device applications that exploit vortices. In this work, we quantitatively imaged the stray magnetic field distribution of vortices in...

Promotion of Lead-induced Cytotoxicity in Differentiating Neural Cells and Protective Effects of Selenium

Lead (Pb) exposure remains a global health concern, particularly because of its adverse effects on neurodevelopment during fetal development and childhood. Early-life exposure to Pb during neuronal differentiation can impair neurodevelopment, although the underlying molecular mec...

Time-resolved imaging of antiferromagnetic skyrmion interactions

Abstract Quantifying particle interactions is central to understanding and controlling collective dynamics in particle-based devices such as those comprising skyrmion ensembles. Here we directly visualize, in real time, the nanosecond current-driven dynamics of an antiferromagnet...

Meta‐Analysis: Prevalence of Non‐ Helicobacter pylori , Non‐ NSAID Peptic Ulcer Disease

BACKGROUND: Non-Helicobacter pylori (H. pylori), non-nonsteroidal anti-inflammatory drug (NSAID) peptic ulcer disease (PUD) is increasingly recognized as a distinct subgroup, but its proportion across clinical presentations remains unclear. AIM: We aimed to estimate this proporti...

Enhanced Room-TemperaturePhosphorescence from CarbonDots Embedded in a Robust SiO2 Matrix

Abstract Carbon dots (CDs) represent a rapidly advancing class of fluorescent nanomaterials. Due to the dominant nonradiative decay channels of the triplet excited state of CDs, these materials generally exhibit no observable phosphorescence (PH) or delayed fluorescence. Here, we...