Kyushu University

Non-asymptotic oracle inequalities for the Lasso in high-dimensional mixture of experts

Abstract We study Lasso estimation for high-dimensional softmax-gated Gaussian mixture-of-experts (SGMoE) regression models, where the predictor dimension P may exceed the sample size N . Under bounded parameters, we establish a non-asymptotic Kullback–Leibler (KL) oracle inequal...

Moso bamboo expansion impacts on root respiration of Japanese cedar forest and secondary broad-leaved forest in a socio-ecological production landscape

Soil respiration and its root-derived component are important pathways for carbon release from forest ecosystems, but they remain poorly understood in expanding bamboo forests. We quantified root respiration and its drivers in an abandoned Moso bamboo forest (BF), a Japanese ceda...

Variable clinical course of retinitis pigmentosa patients with RPE65 gene mutations

This retrospective observational study characterized the clinical features and visual function of early- and later-onset retinitis pigmentosa (RP) caused by biallelic variants in the RPE65 gene ( RPE65 -RP). Nine genetically confirmed patients (seven unrelated individuals and one...

Pd(II)-Templated End-to-End Cyclization of Doubly N-Confused Bilatrienes: A Stable Singlet Diradicaloid Dye with Efficient Absorption across the Solar Spectrum

Abstract We report a highly stable singlet diradicaloid (Pd1-dimer), formed through a Pd(II)-templated end-to-end cyclization of a linear N-confused bilatriene (1). This unique Pd-bridged double-loop complex exhibits an open-shell singlet diradicaloid ground state with an extreme...

Factors associated with persistent methicillin-resistant staphylococcal bacteremia after initiation of anti-MRSA therapy in the NICU: A retrospective observational study

Background Methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase-negative staphylococci (MRCoNS) are important causes of bacteremia in neonatal intensive care units (NICUs). However, clinical factors associated with persistent bacteremia after ini...

When imitation meets exploration: quantifying social efficiency deficits (SED) in vaccination behaviour

Vaccination behaviour plays a critical role in shaping epidemic dynamics, yet the societal consequences of decentralized vaccination decisions remain difficult to quantify. We develop a behavioural-epidemiological framework that combines adaptive vaccination dynamics, behavioural...

Screening strategies for the early detection of non-cardia gastric cancer in low- to moderate-prevalence regions: Asia-Pacific gastroesophageal cancer congress consensus 2026

Abstract Background Gastric cancer (GC) remains a major global health burden, and early detection is essential for improving patient outcomes. Although GC screening has been widely implemented in East Asian countries with a high disease burden, the optimal screening strategy for...

Temporal dissection of hepatitis C virus and orthoflavivirus infections by continuous luminescence monitoring

Virus infection is a dynamic process consisting of rapidly evolving viral and host events, yet conventional endpoint assays provide only fragmented snapshots of these processes. Here, we established a unified temporal framework for dissecting virus-host interactions by integratin...

Circadian Timekeeping in the Tropics: Rhythmic Transcriptome and Diurnal Regulatory Networks in Rubroshorea leprosula

Abstract Circadian rhythms allow plants to regulate internal processes to align with daily rhythms in the environment. Comparing circadian clocks across environments is essential because latitude-dependent variation in light and temperature imposes distinct selection pressures th...

Subperiosteal hematoma of the ilium in adolescent athletes with acute groin pain: clinical and MRI features of a radiograph-occult injury pattern

Subperiosteal hematoma of the ilium is an uncommon MRI finding in young athletes with acute groin pain and is frequently occult on plain radiographs. This study aimed to characterize its clinical presentation, MRI findings, associated injuries, and return-to-sport outcomes. This...

Extendability of the $$B_2$$-Arrangement

Abstract Let $$({\mathscr {A}},m)$$ ( A , m ) be a free multiarrangement, and let $${\mathscr {E}}$$ E be an extension of $$({\mathscr {A}},m)$$ ( A , m ) . It is well known that if $${\mathscr {A}}$$ A is the Coxeter arrangement of type $$A_2$$ A 2 , then a free extension of $$(...

Seismo-ripples

Earthquake prediction has long been considered one of the greatest challenges in the global scientific community due to the complex and uncertain nature of seismogenic processes, along with the prevailing consensus that earthquakes are inherently unpredictable. Here, we present a...

The Utilization of Citrus Peel in Edible Coating for Maintaining Food Quality

ABSTRACT Food deterioration remains a global challenge for creating a sustainable food system and ensuring food security. Citrus peel as a food waste can be utilized due to the abundant amount of bioactive compounds which promote health benefit properties and maintain food produc...

Advancing Heart Failure Classification Beyond Left Ventricular Ejection Fraction: Unsupervised Machine Learning Insights From the Japanese Nationwide Acute Decompensated Heart Failure Cohort: JROADHF

Background Heart failure (HF) classification based on left ventricular ejection fraction (LVEF) inadequately captures HF heterogeneity, limiting phenotype‐specific therapies. While machine learning (ML) has been applied to HF with preserved ejection fraction, comprehensive approa...

Hydro-Mechanical Degradation and Progressive Failure of Sandstone–CGFB Composite Structures Under Cyclic Water Immersion: Implications for Water-Induced Instability Risk in Backfilled Goafs

Sandstone and cemented coal gangue-fly ash backfill (CGFB) form composite load-bearing structures in goafs, where repeated water ingress and drainage may weaken stability. This study investigated sandstone–CGFB composite specimens subjected to 0, 3, 6, and 10 water immersion–dryi...

Iterative calculation values in Collatz conjecture eventually reach 1 as if walking across tightropes: Proof of the correctness of the Collatz conjecture using the Collatz Rope Model

I have previously reported the results of my investigations into the Collatz conjecture in two papers. In the first paper (Shiraishi, 2026a), I examined the properties of the values generated through iterative calculation, based on extensive numerical experiments. I also proposed...

A configurational-force-guided intra-element cracking strategy for ECZM-FDEM rock fracture simulation

Crack paths in cohesive-zone-model-based finite-discrete element method (CZM-FDEM) simulations are often constrained by pre-existing element boundaries, while intrinsic cohesive insertion may introduce artificial compliance before fracture activation. This study develops a config...

Skin improvement by oral administration of Fructobacillus fructosus OS-1010 strain and the possible involvement of exosomes

This study investigated the anti-aging effects of exosomes derived from Fructobacillus fructosus OS-1010-treated Caco-2 cells on dermal fibroblasts and aged skin. These exosomes enhanced the expression of longevity-related genes (SIRT1, nicotinamide phosphoribosyltransferase (NAM...

Parallel Evolution of Bacteroidota as Long-Term Endosymbionts of Insects

Symbiotic relationships significantly transform both symbiont and host biology. The most visible changes include a massive reduction of the endosymbiont genome and the development of specialized host organs, cells, and compartments for symbiont housing. However, insect symbiosis...

Effects of Foreign Aid on Asia–Pacific Total Fertility Rates

ABSTRACT Amid persistently declining and uneven fertility trends across the Asia–Pacific, whether foreign aid actively shapes regional fertility behaviour remains an open empirical question. This study investigates the net effects of sector‐specific foreign aid on total fertility...