Meiji University

Self-organized spectral adjustment in echolocation sounds within group-flying bats

Self-organized behaviour has been extensively studied in group dynamics in animals, with a strong focus on movement coordination in species like fish and birds. By contrast, far less attention has been paid to vocal interactions within animal groups. Here, we unveil a self-organi...

Impacts of coal smoke on infant mortality: Evidence from industrializing Japan

Abstract This study investigates the health consequences of coal smoke during Japan's early industrialization. Using fixed‐effects models and a prefecture‐level panel dataset on actual coal consumption and infant mortality from 1899 to 1910, this study finds that higher coal cons...

Ranking-Based Surrogate Modeling for Bayesian Optimization under Small-Data Conditions

Abstract Bayesian optimization (BO) is widely used for reaction optimization, but under small-data conditions, regression of absolute objective values may not align with the practical goal of prioritizing promising experiments. Here, we compared ranking-based BO (RankBO) combined...

Arabidopsis TITAN-LIKE is required for U12-type intron splicing, especially of AT-AC subtypes.

Many eukaryotes possess two types of spliceosomes: the U2-dependent and U12-dependent spliceosomes. The U2-dependent spliceosome processes >99% of all introns, whereas the U12-dependent spliceosome acts on only ~0.3% of introns, one-third of which start with AT and end with AC, w...

IL-22 Increases Proglucagon-expressing Enteroendocrine Cells via STAT3 in Human iPSC-derived Intestinal Epithelium

Intestinal epithelial differentiation is tightly regulated to maintain tissue homeostasis and systemic metabolic function. Although the intrinsic transcriptional programs governing enteroendocrine cell (EEC) development have been characterized extensively, the role of extrinsic i...

Health impacts of public pawnshops in Industrialising Tokyo

Abstract This study examines whether expanded credit access through low‐interest small loans relaxed liquidity constraints among poor households and improved early‐life health in industrialising Tokyo. Using ward‐level panel data for 1927–1935, this study shows that public pawnsh...

Differences in student loyalty factors by university level in Japan

This study comprehensively evaluated the impact of factors influencing student loyalty based on university level, targeting universities in Japan's metropolitan area. Soft factors included lectures (both offline/online), seminars, and administrative services; and hard factors inc...

Sand Influx Effect on Barchan Steady-state Profile

In this study, based on the crest line model, a differential equation-based mathematical approach to dune dynamics, we investigate the effect of non-contact interactions between barchans through sand flow on their morphodynamics, which is a largely unexplored topic. Numerical cal...

Terminology for describing the 24-h cycle of physical activity, sedentary behaviour, and sleep: a scoping review

Abstract Background Physical activity, sedentary behaviour, and sleep are three behaviours which occupy the 24-h cycle and interact to influence a multitude of health outcomes. Different terms are currently used to describe these behaviours collectively (e.g., movement behaviours...

Effects of daily intake of cacao polyphenols, alone or with milk protein, on skeletal muscle mass in community-dwelling older adults: an exploratory 16-week randomized, open-label, parallel-group trial

Abstract Background Evidence on food-based strategies to maintain muscle-related body composition in older adults under habitual lifestyle conditions is limited. Cacao flavanols may influence vascular and redox pathways, whereas milk protein provides amino acids relevant to muscl...