Tokyo University of Science

Modeling Investment Decisions in Renewable Energy and Cryptocurrency Mining Under Uncertainty

Operations research has long contributed to addressing energy and environmental challenges through mathematical modeling and decision-support methods. In particular, numerous studies have examined investment planning, capacity expansion, and policy design for renewable energy sys...

ElectronicStructure of Cu-Phthalocyanine Metal–OrganicFramework

Abstract Metal phthalocyanine metal–organic frameworks (MPc-MOFs) possess a crystalline structure consisting of stacked molecular layers that form a square lattice composed of metal phthalocyanine (MPc) units. The unique structure of these MPc-MOF molecular layers is theoreticall...

Scandium Doping and Coating for Improving O3‐NaNi 1/2 Mn 1/2 O 2 Electrode in Sodium Battery

ABSTRACT Scandium ion, Sc 3+ , was introduced into O3‐Na[Ni 1/2 Mn 1/2 ]O 2 either by bulk doping or by surface coating. We prepared O3‐type Na[(Ni II 1/2 Mn IV 1/2 ) 1‐ x Sc III x ]O 2 and Sc 2 O 3 ‐coated Na[Ni 1/2 Mn 1/2 ]O 2, and the resulting materials were systematically co...

PercolationMechanisms in Transient Polymer Networksacross Dilute and Semidilute Regimes

Abstract Percolation in transient polymer networks remains poorly understood because reversible cross-links continuously reorganize the network structure. In this study, we investigated percolation in transient polymer networks by independently controlling network connectivity an...

Volcanic earthquake swarms at Izu-Oshima in 2023

Earthquake swarms are known to reflect underground fluid movement and stress changes. However, their occurrence patterns and the mechanisms underlying hypocenter migration remain poorly understood. In this study, we focused on two earthquake swarms that occurred at Izu-Oshima in...