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Waseda University


Fascicle gearing dynamics: Unveiling 3D rotation effects in muscle elongation

Researchers at Waseda University used diffusion tensor imaging to reconstruct fascicles in three dimensions, finding that a gearing mechanism reduces individual fascicle elongation during stretching. This mechanism allows muscles to extend without significant fiber length changes, preventing overstretching and injury.

SourceWaseda University·JournalMedicine & Science in Sports & Exercise·TypeExperimental study·DateDec 6, 2023

Understanding the dynamic behavior of rubber materials

A team of researchers has developed a novel experimental system to simultaneously measure the mechanical properties and internal structure of rubber-like materials. The study found that strain within these materials is non-uniform, depending on the shape and size of composite particles.

SourceWaseda University·JournalMechanical Systems and Signal Processing·TypeImaging analysis·DateNov 9, 2023

Ability to drive a car influences quality of life of older adults in Japan

A study by Waseda University researchers found that car ownership among older Japanese adults is associated with higher self-rated health status, greater independence, and a more positive attitude towards receiving help. The study suggests that autonomous driving may play a key role in improving mobility for older adults.

SourceWaseda University·JournalTransportation Research Part A Policy and Practice·TypeData/statistical analysis·DateSep 19, 2023

Novel proton-conductive membranes for automobile fuel cells

Scientists have synthesized proton-conductive membranes based on partially fluorinated aromatic ionomers, which exhibit high durability and ion conductivity. These membranes outperform existing ones in fuel-cell operation, chemical stability, and mechanical properties, paving the way for more powerful and affordable electric vehicles.

SourceWaseda University·JournalScience Advances·TypeExperimental study·DateAug 3, 2023

A novel, completely solid, rechargeable air battery

Researchers at Waseda University have developed a novel, completely solid, rechargeable air battery that uses a benzoquinone-based negative electrode and solid Nafion polymer electrolyte. The battery exhibits high performance and close to maximum capacity, overcoming metal-based battery limitations and liquid electrolyte safety concerns.

SourceWaseda University·TypeExperimental study·DateJun 12, 2023

Petit-spot volcanoes involve the deepest known submarine hydrothermal activity, possibly release CO2 and methane

Scientists discover hydrothermal deposits at a 5.7 km depth in the Japan Trench, indicating low-temperature hydrothermal activity and elevated CO2 and methane levels. The findings highlight the need for further studies on petit-spot volcanoes and their potential impact on global biogeochemical cycles.

SourceWaseda University·JournalCommunications Earth & Environment·TypeExperimental study·DateJun 1, 2023

Eat right, live longer: could a moderate protein diet be the coveted elixir of youth?

A recent study published in GeroScience found that a moderate-protein diet (25% and 35%) improved metabolic health in both young and middle-aged mice. The researchers also observed reduced blood glucose concentrations and lipid levels in liver and plasma. A balanced diet with moderate protein intake may promote metabolic health in huma...

SourceWaseda University·JournalGeroScience·TypeExperimental study·DateMay 31, 2023

Helium nuclei research advances our understanding of cosmic ray origin and propagation

The CALET team, including researchers from Waseda University, found that cosmic ray helium particles follow a Double Broken Power Law, indicating spectral hardening and softening in high-energy ranges. This deviation from expected power-law distribution suggests unique sources or mechanisms accelerating and propagating helium nuclei.

SourceWaseda University·JournalPhysical Review Letters·TypeObservational study·DateMay 25, 2023

Versatile, high-speed, and efficient crystal actuation with photothermally resonated natural vibrations

A team of scientists from Waseda University and Tokyo Institute of Technology have successfully demonstrated large-angle photothermally resonated high-speed bending induced by pulsed UV irradiation. They used 2,4-dinitroanisole β-phase crystals to achieve a fast natural vibration at 390 Hz with a large photothermal bending angle.

SourceWaseda University·JournalNature Communications·TypeExperimental study·DateApr 20, 2023

Waseda University researchers measure boron flux in high-energy cosmic rays with the CALorimetric Electron Telescope (CALET)

Researchers from Waseda University measured the energy spectrum of boron and the B/C flux ratio in high-energy cosmic rays using the CALorimetric Electron Telescope. The results indicate a different spectral index for boron compared to carbon, with implications for our understanding of cosmic ray propagation mechanisms.

SourceWaseda University·JournalPhysical Review Letters·TypeObservational study·DateJan 26, 2023

Discovering rare red spiral galaxy population from early universe with the James Webb Space Telescope

The James Webb Space Telescope has captured infrared images of a population of red spiral galaxies at unprecedented resolution, revealing their morphology in detail. These galaxies are among the farthest known spiral galaxies and suggest that such spiral galaxies existed in large numbers in the early universe.

SourceWaseda University·JournalThe Astrophysical Journal Letters·TypeImaging analysis·DateDec 12, 2022

Novel 3D printing method to fabricate complex metal–plastic composite structures

Researchers developed a novel 3D printing technique to fabricate complex metal–plastic composite structures with arbitrarily complex shapes. The process, called MM-DLP3DP, allows for the creation of precise metal patterns and high-quality metal coatings, enabling the development of highly integrated and customizable microelectronics.

SourceWaseda University·JournalACS Applied Materials & Interfaces·TypeExperimental study·DateNov 30, 2022

Electronic laboratory notebook for materials science: A lossless data management platform for machine learning and sharing of experimental information

Researchers developed an electronic laboratory notebook that uses knowledge graphs to describe material properties and experimental processes. The platform enables automated analysis, lossless sharing, and discovery of new materials with potential applications in energy-related devices.

SourceWaseda University·Journalnpj Computational Materials·TypeData/statistical analysis·DateSep 21, 2022

Multi-spin flips and a pathway to efficient ising machines

A team of researchers from Waseda University developed a novel solution to efficiently solve complex optimization problems using Ising machines. Their hybrid algorithm reduces residual energy and reaches more optimal results in shorter time, increasing the machine's applicability across industries and sustainability practices.

SourceWaseda University·JournalIEEE Transactions on Computers·TypeComputational simulation/modeling·DateMay 31, 2022

A first step towards quantum algorithms: minimizing the guesswork of a quantum ensemble

A team from Waseda University derives analytical solutions to the guesswork problem for quantum ensembles, extending previous results to ensembles with uniform probability distributions. The findings have significant implications for quantum science and technology, including quantum chemistry and software for quantum computing.

SourceWaseda University·JournalIEEE Transactions on Information Theory·TypeExperimental study·DateMar 10, 2022

New study suggests an alternative technique for determining the true activity of catalysts

Researchers from Waseda University have developed an alternative technique, sampled current voltammetry (SCV), to accurately determine the activity of electrocatalysts used in water-splitting reactions. The study shows that SCV can provide reliable measurements of electrocatalytic performance at constant steady-state applied voltages.

SourceWaseda University·JournalJournal of The Electrochemical Society·TypeExperimental study·DateJan 31, 2022

Chewing to stay slim: how to savor your food better and dodge weight gain, too!

A recent study published in Scientific Reports found that chewing food thoroughly increases energy expenditure through diet-induced thermogenesis (DIT), which helps prevent obesity. The study involved participants who chewed liquid food for varying durations, revealing that prolonged chewing and tasting increased DIT, gas exchange, pro...

SourceWaseda University·JournalScientific Reports·TypeExperimental study·DateJan 12, 2022

New study reveals how epithelial cells in the body naturally eliminate “precancerous” ones

Researchers have identified a novel immune-like mechanism by which healthy epithelial cells recognize and eliminate precancerous cells through a MHC class I-LILRB3 interaction. This process generates mechanical force to extrude the precancerous cells from the body, offering new hope for cancer prevention and treatment.

SourceWaseda University·JournalNature Immunology·TypeExperimental study·DateDec 15, 2021