A5019258915- Cryospheric studies and observations
- Combustion and flame dynamics
- Fire dynamics and safety research
- Combustion and Detonation Processes
- Winter Sports Injuries and Performance
- Climate change and permafrost
- Polar Research and Ecology
- Arctic and Antarctic ice dynamics
- Advanced Combustion Engine Technologies
- Computational Fluid Dynamics and Aerodynamics
- Rocket and propulsion systems research
- Flame retardant materials and properties
- Landslides and related hazards
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Gas Dynamics and Kinetic Theory
- Catalytic Processes in Materials Science
- Food Industry and Aquatic Biology
- Cyclopropane Reaction Mechanisms
- Arctic and Russian Policy Studies
- Catalytic C–H Functionalization Methods
- Geotechnical Engineering and Soil Mechanics
- Plasma and Flow Control in Aerodynamics
- Heat transfer and supercritical fluids
- Evacuation and Crowd Dynamics
Musashino Red Cross Hospital
2025
Gifu University
2015-2024
Aichi Developmental Disability Center
2024
Hokkaido University
1979-2023
Kyushu Institute of Technology
2015-2023
Toyohashi University of Technology
2021-2023
Hokkaido University Hospital
2023
Chiba University Hospital
2023
Shimizu (Japan)
2023
Kitasato University
2023
The East Antarctic Ice Sheet is the largest, highest, coldest, driest, and windiest ice sheet on Earth. Understanding of surface mass balance (SMB) Antarctica necessary to determine present state sheet, make predictions its potential contribution sea level rise, past history for paleoclimatic reconstructions. However, SMB values are poorly known because logistic constraints in extreme polar environments, they represent one biggest challenges science. Snow accumulation most important...
Global cooling in intermediate glacial climate with northern ice sheets preconditions climatic instability bipolar seesaw.
Abscess-forming cervical bacterial infections are rare and serious infections. Methods: We retrospectively examined the trends in abscess-forming children who required inpatient treatment three periods before (January 2016 to June 2020), during (July 2020 December 2022) after COVID-19 pandemic 2023 2024). Results: The study included 96 patients with superficial abscesses 111 deep (34 retropharyngeal abscesses, 51 peritonsillar 26 neck abscesses). Both decreased increased significantly...
Abstract The surface mass balance (SMB) at Dome Fuji, East Antarctica, was estimated using 36 bamboo stakes (grid of 6 × 6, placed 20 m intervals) from 1995 to 2006. heights the stake tops snow were measured 0.5 cm resolution twice monthly in 1995, 1996, 1997 and 2003, once a year for rest study period. To account settling, average density base during measurements used converting stake-height data SMB. annual SMB 2006 Fuji 27.3 ± 1.5 kg −2 −1 . This result agrees well with AD 1260 1993 (26.4...
To clarify the behavior of blade tip vortices a wind turbine equipped with brimmed-diffuser shroud, called “Wind-Lens turbine”, we conducted three-dimensional numerical simulation using large eddy (LES). Since this unique consists not only rotating blades but also diffuser shroud broad-ring brim at exit periphery, flow field around is highly complex and unsteady. Previously, our research group simulations an actuator-disc approximation, in which were simply modeled as external force on...
The effects of using a wind acceleration device (wind lens) with vertical-axis turbines in tunnel experiments were examined. A lens consists diffuser and flanges, this study investigated the optimum parameters their configuration regard to power augmentation turbines. flat-panel-type demonstrated by factor 2.0 compared an open turbine. An increase from 5° 20° semi-open angle made it possible generate 30% high output over wide range tip speed ratios. On that basis, was determined. For...
The horizontal divergence of drifting snow was estimated from the ice-sheet topography on Mizuho Plateau, East Antarctica. calculation made by using a relationship between snow-drift transport rate and wind speed surface slope. thus for Station (70°42′S, 44°20′E) consistent with observations net mass balance, precipitation sublimation. Around southern region Yamato Mountains, large predicted this is believed to be principal cause bare ice field. Other factors in formation preservation...
The Moon cast a long shadow over Antarctica on 23 November 2003 in total solar eclipse. eclipse was observed at Dome Fuji Station, located the highest point of East Dronning Maud Land, Antarctica, and lasted 1 h 41 min 37 s cloudless condition, during which Sun completely obscured for 43 s. This first to be Antarctic ice sheet. During Fuji, air temperature 1.5 m above snow surface subsurface decreased by 3.0 K 1.8 K, respectively. Estimated temperatures 4.6 K. Atmospheric pressure wind...
The algorithm which takes into account the effect of refraction sound wave paths for acoustic computer tomography (CT) is developed. Incorporating ordinary CT algorithms are based on Fourier transformation very difficult. In this paper, least-squares method, capable considering effect, employed to reconstruct two-dimensional temperature distribution. solved by writing a set differential equations derived from Fermat's theorem and calculus variations. It impossible carry out analysis...
A new polyketide, named hakuhybotrol (1), was isolated from a cultured broth of the mycoparasitic fungus Hypomyces pseudocorticiicola FKA-73, together with six known analogs, cladobotric acids F (2), E (5), H (6), and (7), pyrenulic acid (3), F2928-1 (4), in course our antifungal screening program. The structure compound 1 established through comprehensive analysis using high-resolution mass spectrometry 1D 2D NMR, its absolute configuration determined by combination chemical derivatization,...
Abstract We analyze sea-ice conditions along seven segments of the Northern Sea Route (NSR) over four time periods. researched sea ice by segment, using data from satellite microwave sensors SMMR, SSM/I and AMSR-E. The analysis periods (periods I–IV: 1980–88, 1989–2001, 2002–06 2007–11, respectively) were determined based on changes in extent minimum throughout Arctic Ocean. showed a decreasing tendency period I to IV. For example, area IV decreased compared previous eastern East Siberian...