Nagoya Institute of Technology

Two Self‐Stabilizing Algorithms for the Maximal Pentagon Partitioning Problem

ABSTRACT Given an undirected graph , a collection of disjoint subsets of nodes is called a pentagon partition if each subset satisfies one of the following conditions: (1) and the induced subgraph contains a simple cycle of length 5 (called pentagon ) or (2) . Let denote the set...

Incorporation of Nb and Ta into Calcium Borate Sol−Gel Glasses and Their Impact on the Structure and Properties

The effects of incorporating Nb2O5 or Ta2O5, both intermediate oxides, on the structure and ion release behavior of calcium borate-based sol−gel glasses [(70 − x)B2O3-30CaO-xM2O5, x = 0, 2.5, 5, and 7.5 (mol%), and M = Nb or Ta] were investigated. The glasses were prepared by dis...

Molecular mechanism of calcium inhibition in viral channelrhodopsins

Abstract Viral channelrhodopsins (VCR1s) are giant-virus-encoded light-gated channels permeable to monovalent and divalent cations, including Na + and Ca 2+ ions, and inhibited by millimolar Ca 2+ concentrations. Here, we combine X-ray crystallography, time-resolved UV-vis spectr...

Multiscale modelling of ferroelectrics using a physics-informed neural network driven by molecular dynamics data: parameter identification and field reconstruction

Abstract In multiscale modeling of ferroelectric materials, a fundamental challenge is to transfer discrete atomistic information into a continuum phase-field model (PFM) while retaining an accurate description of mesoscale behavior. In this paper, a physics-informed neural netwo...

Fast and accurate algorithms for matrix multiplication using fused multiply-add and their rounding error analysis

Abstract We propose a numerical algorithm for accurate matrix multiplication. When standard floating-point arithmetic fails to deliver sufficient accuracy, high-precision techniques such as pair arithmetic and double-word arithmetic are typically employed, although at the expense...

Asymmetric defect distribution generates bulk Dzyaloshinskii–Moriya interaction in Pt/Co/Pt

The Dzyaloshinskii–Moriya interaction (DMI) in magnetic multilayers plays a pivotal role in spintronic applications by enabling the stabilization and manipulation of chiral spin textures, including chiral domain walls and skyrmions. While interfacial DMI in asymmetric multilayers...

Improvement in Surface Quality of Ironing Product Using Differential Lubrication

Ironing is an effective process for precisely finishing a formed product at the final stage of a series of forming processes. Generally, a high-performance lubricant oil with high viscosity is used to prevent galling under severe forming conditions, but high-viscosity oil is diff...

Electrochemical Imaging of Hydrogen Evolution Reaction Sites at Transition Metal Dichalcogenide Nanosheets

Understanding spatial heterogeneity in catalytic activity is essential for designing efficient hydrogen evolution reaction (HER) catalysts. In this study, scanning electrochemical cell microscopy (SECCM) was employed to directly image local HER activity on transition metal dichal...