Waseda University

Inhibitory Activity on Dog Bladder Cancer Organoids by Lanostane-type Triterpenes from Inonotus obliquus and Reinvestigation of Their NMR Assignments

Abstract Dog bladder cancer organoids (DBCO) serve as a model of human muscle-invasive bladder cancer (MIBC), for which suitable human organoid models remain limited. Inonotus obliquus (Chaga) extract reportedly reduces DBCO growth, but its active constituents were unidentified....

Nuon Chea and Thai Intellectuals in Thailand's Communist Movement (1945–1950)

Drawing on interviews with Nuon Chea (1926–2019) and former members of the Communist Party of Thailand (CPT), together with contemporary publications and surviving educational and administrative records, this study reconstructs Nuon Chea's life and political activities in Bangkok...

WeatherAgent-SAM: Text-Grounded Agentic Tool Selection for Robust SAM Segmentation

The Segment Anything Model (SAM) provides a versatile promptable segmentation interface, but adverse weather and image degradation can obscure visual cues and substantially reduce its accuracy. Existing approaches mainly follow two directions to mitigate this issue. The first ada...

Corrosion-induced cracking behaviour of RC beams: experimental investigation, empirical modelling, and finite element analysis

This study investigates corrosion-induced cracking in reinforced concrete (RC) beams through experiments, empirical modelling, and finite element (FE) analysis. Specimens corroded using the galvanostatic (GS) and artificial chloride environment (ACE) methods were examined using X...

Structural and Mechanistic Basis of Bacterial 2-Methyl-ACC Synthases

Abstract Cyclopropane-containing amino acids are found in diverse natural products and contribute to their structural complexity and biological activity. However, the distribution of bacterial biosynthetic pathways that produce methylated cyclopropane amino acids and the structur...

UAV-based super-resolution instance segmentation enables ecological monitoring of sea cucumbers in shallow coral reef habitats

Accurate monitoring of sea cucumbers from UAV imagery remains challenging because submerged individuals often exhibit low contrast, camouflage against coral-rubble backgrounds, and weak boundary information under water-surface disturbance. In particular, key visual cues such as b...

Gendered Pathways to First Imprisonment in Midlife and Later Adulthood: A Life-Course Perspective from Japan

This study extends gendered pathways research by applying a gendered life-course perspective to women’s first imprisonment in Japan. Using data from 110 women convicted of property offenses residing in a halfway house, it compared women first imprisoned before age 40 with those f...

Countermovement jump test as a tool for fatigue assessment: a scoping review and evidence gap map

The countermovement jump (CMJ) is widely used to monitor post-exercise neuromuscular status; however, differences in exercise loads, testing procedures, and selected variables complicate the interpretation of CMJ responses. This scoping review mapped the available evidence on CMJ...

Rapid identification of handedness via motor variability of circular finger movements

Handedness is an important indicator of the brain’s functional lateralization, yet it is mainly assessed using subjective self-report inventories that are prone to ceiling effects and heavily skewed distributions. Here, we propose a rapid behavioral metric for identifying hand do...

ANOVATS: a subsampling-based test to detect differences among short time series in marine studies

Assessing marine ecosystems is important for understanding the impacts of climate change and human activity, as well as for maintaining healthy oceans and ecosystems. In marine science, it is common for biologists and geologists to identify regional differences based on expert kn...

The Profligacy Paradox: Why Limitarianism Needs a Lifetime Limit

ABSTRACT Limitarianism's paramount claim is that no one should possess surplus wealth. Ingrid Robeyns's Power of Material Resources (PMR), the leading operationalization of that claim, identifies such surplus through a snapshot of income and annuitized assets. This article argues...

A district-level screening framework to prioritize decentralized food-waste recovery for landfill methane mitigation in Indonesia

Where should Indonesia prioritize decentralized food-waste recovery to reduce landfill methane? This study develops a district-level screening framework that combines public waste records with decentralized infrastructure data to identify where food-waste methane-mitigation poten...

Benchmarking token mixers for efficient transformer-based learned video compression

Learned video compression has rapidly evolved, with recent approaches demonstrating potential in complex context modeling. However, these performance gains often come at the cost of significant complexity in both framework design and computation-heavy modules, obscuring the effic...

The Mysterious Case of Iron in XMPs: Anomalous High log(Fe/O) Observed in Extremely Metal-Poor Galaxies HSCJ1631+4426 and SDSSJ0811+4730

Abstract We present integral field spectroscopic observations of two local extremely metal-poor galaxies (XMPs), HSCJ1631+4426 and SDSSJ0811+4730, obtained with the Keck Cosmic Web Imager (KCWI) over 3545 − 5529 Ã at a spectral resolution of R ~ 3600, capturing bright nebular emi...

Besov spaces associated with the harmonic oscillator

Abstract The Besov space associated with the harmonic oscillator is introduced and thoroughly explored in this paper. It provides a comprehensive summary of the fundamental concepts of the Besov spaces, their embedding properties, bilinear estimates, and related topics.

Comparative analysis of heel fat pad morphology among university athletes from different sports

The heel fat pad (HFP) is an important shock-absorbing tissue involved in dynamic activities. Although body weight is known to influence HFP thickness, the differences in HFP morphology among athletes across sports have not been fully elucidated. In this study, we aimed to compar...

Data-Driven Portfolio Optimization Using a Predict-Then-Optimize Framework

Effective portfolio diversification remains a central challenge in quantitative asset management. In this study, we propose a data-driven framework based on the predict-then-optimize (PO) paradigm, which combines return forecasting with portfolio allocation in a sequential manner...

Estimation of auroral emission altitude in the region of the ISS magnetic footprint during a relativistic electron precipitation event observed by ISS-CALET

We report a multi-MeV relativistic electron precipitation (REP) event as observed by the CALorimetric Electron Telescope and the Monitor of All-sky X-ray Image aboard the International Space Station, together with low-cost twin all-sky auroral imagers installed at Athabasca, Cana...

Preliminary assessment of airborne microplastics: a case study of Bandung City, Indonesia

Despite the growing concern surrounding airborne microplastics (AMPs), their size-dependent behavior in tropical urban environments remains poorly understood. This study provides a preliminary assessment of the concentration, polymer composition, morphology, and size-segregated a...

An automated endpoint control platform for a cyclone concentration pipette

In the point-of-care, microfluidic, and biochemistry areas, the sample volume is becoming as small as µL order. In this study, we introduce a cyclone concentration pipette that integrates quantitative concentration and sample ejection functions for liquid volume conversion (mL to...