Kohei Fukuda

ORCID: 0000-0002-8883-9251
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About
Contact & Profiles
Research Areas
  • Astro and Planetary Science
  • Planetary Science and Exploration
  • Particle Detector Development and Performance
  • Isotope Analysis in Ecology
  • CCD and CMOS Imaging Sensors
  • High-pressure geophysics and materials
  • Astrophysical Phenomena and Observations
  • Stellar, planetary, and galactic studies
  • Aquaculture disease management and microbiota
  • Microbial Community Ecology and Physiology
  • Nuclear Physics and Applications
  • Genomics and Phylogenetic Studies
  • Geological and Geochemical Analysis
  • Aquaculture Nutrition and Growth
  • Spacecraft and Cryogenic Technologies
  • Ion-surface interactions and analysis
  • Esophageal Cancer Research and Treatment
  • Medical Imaging Techniques and Applications
  • Animal Virus Infections Studies
  • Advanced Radiotherapy Techniques
  • Radiation Detection and Scintillator Technologies
  • Astrophysics and Star Formation Studies
  • Brain Metastases and Treatment
  • Geology and Paleoclimatology Research
  • Bacteriophages and microbial interactions

Osaka University
2018-2025

Hiroshima University
2023-2025

Osaka Health Science University
2025

Nara Medical University
2025

University of Wisconsin–Madison
2018-2024

Ishikiriseiki Hospital
2021-2024

University of Tsukuba
2024

Teikoku Seiyaku (Japan)
2024

Canon (Japan)
2023

University of Tsukuba Hospital
2019-2022

Understanding the origin and evolution of near-Earth asteroids (NEAs) is an issue scientific interest practical importance because NEAs are potentially hazardous to Earth. However, when how formed their evolutionary history remain enigmas. Here, we report U-Pb systematics Itokawa particles for first time. Ion microprobe analyses seven phosphate grains from a single particle provide isochron age 4.64 ± 0.18 billion years (1σ). This ancient thought represent thermal metamorphism Itokawa's...

10.1038/s41598-018-30192-4 article EN cc-by Scientific Reports 2018-08-01

Short-lived radionuclides (SLRs) once present in the solar nebula can be used as probes of formation environment our Solar System within Milky Way Galaxy. The first-formed solids System, calcium-, aluminum-rich inclusions (CAIs) meteorites, record one-time existence SLRs such 10Be and 26Al nebula. We measured 10Be–10B isotope systematics 29 CAIs from several CV3, CO3, CR2, CH/CB chondrites show that all except for a FUN CAI homogeneous initial 10Be/9Be with single probability density peak at...

10.1016/j.gca.2022.02.002 article EN cc-by Geochimica et Cosmochimica Acta 2022-02-07

10.5220/0013100100003912 article EN Proceedings of the 17th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications 2025-01-01

Stereotactic body radiotherapy (SBRT) is a precise treatment modality for lung cancer, delivering high-dose radiation to tumors while sparing surrounding organs. However, because of their intracardiac placement and proximity the chest field, leadless pacemakers (LLPMs) pose unique challenges that are not fully addressed by existing protocols conventional pacemakers. In this case study, we aimed emphasize importance identifying LLPMs before initiating SBRT cancer discuss necessary adjustments...

10.1097/md.0000000000041808 article EN cc-by-nc Medicine 2025-03-07

ABSTRACT Rationale Matrix effects by secondary ion mass spectrometry (SIMS) are empirically corrected calibration using matrix‐matched reference materials. However, conventional parametric regression cannot estimate the prediction uncertainty to account for difference in compositions of new data and Applying Gaussian process (GPR), a nonparametric probabilistic method, enables correction matrix effect while providing quantitative uncertainty. Methods We developed GPR models estimating...

10.1002/rcm.10038 article EN cc-by-nc Rapid Communications in Mass Spectrometry 2025-03-31

This study aimed to identify prognostic factors for response whole-brain radiotherapy (WBRT) in patients with brain metastases (BMs) from non-small cell lung cancer (NSCLC).This retrospectively evaluated 100 who underwent WBRT BMs NSCLC between December 2012 and October 2017. Clinical were tested associations overall survival after WBRT.The median follow-up time was 134 days (range=14-1,395 days), the 143 days, 1-year rate 30.4%. Univariate multivariate analyses revealed that better...

10.21873/invivo.11459 article EN In Vivo 2018-12-26

Abstract Cylindrical molecular filaments are observed to be the main sites of Sunlike star formation, while massive stars form in dense hubs at junction multiple filaments. The role hub–filament configurations has not been discussed yet relation birth environment solar system and infer origin isotopic ratios short-lived radionuclides (SLR, such as 26 Al) calcium–aluminum-rich inclusions (CAIs) meteorites. In this work, we present simple analytical estimates impact stellar feedback on young...

10.3847/2041-8213/acc849 article EN cc-by The Astrophysical Journal Letters 2023-04-01

141 filterable bacteria that passed through a 0.22 μm pore size filter were isolated from Lake Sanaru in Hamamatsu, Japan. These belonged to Proteobacteria, Bacteroidetes, Firmicutes, or Actinobacteria among which the first two phyla comprised majority of isolates. 48 isolates (12 taxa) are candidates assignable new bacterial species genera Proteobacteria Bacteroidetes.

10.1080/09168451.2018.1456317 article EN Bioscience Biotechnology and Biochemistry 2018-03-30

This study aimed to identify factors that predict prognosis after radiotherapy for brain metastases (BMs) from small-cell lung cancer (SCLC). retrospectively evaluated 48 consecutive patients who underwent whole-brain (WBRT) BMs SCLC between February 2008 and December 2017. WBRT was delivered at a median dose of 30 Gy (range: 30-40 Gy) in 10 fractions 10-16 fractions). Clinical were tested associations with overall survival WBRT. The 1-year rate treatment 232 days 34.4%, respectively....

10.1093/jrr/rry107 article EN cc-by-nc Journal of Radiation Research 2018-12-03

We have been developing monolithic active pixel sensors, X-ray Astronomy SOI XRPIXs, based on a Silicon-On-Insulator (SOI) CMOS technology as soft sensors for future Japanese mission, FORCE (Focusing On Relativistic universe and Cosmic Evolution). The mission is characterized by broadband (1-80 keV) imaging spectroscopy with high angular resolution ($<15$~arcsec), which we can achieve about ten times higher sensitivity in comparison to the previous missions above 10~keV. Immediate readout of...

10.1117/12.2312098 preprint EN 2018-07-10
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