A5060455432- Viral Infections and Vectors
- Advanced Numerical Methods in Computational Mathematics
- Bat Biology and Ecology Studies
- Composite Structure Analysis and Optimization
- Fire effects on ecosystems
- Numerical methods in engineering
- Electromagnetic Simulation and Numerical Methods
- Viral Infections and Outbreaks Research
- Animal Virus Infections Studies
- Mosquito-borne diseases and control
- Elasticity and Wave Propagation
- Electromagnetic Scattering and Analysis
- COVID-19 Clinical Research Studies
- Topology Optimization in Engineering
- SARS-CoV-2 and COVID-19 Research
- Robotic Locomotion and Control
- Contact Mechanics and Variational Inequalities
- Vector-Borne Animal Diseases
- Structural mechanics and materials
- Soil, Finite Element Methods
- Semiconductor Lasers and Optical Devices
- Structural Load-Bearing Analysis
- Yersinia bacterium, plague, ectoparasites research
- Control and Dynamics of Mobile Robots
- Educational Robotics and Engineering
National Institute of Infectious Diseases
2019-2024
Tokyo University of Agriculture and Technology
2020-2024
Osaka Electro-Communication University
2022
Tokyo University of Science
1979-2021
Tokyo Institute of Technology
2003-2004
The University of Tokyo
1974-1995
Florida State University
1991
Tokyo University of the Arts
1986-1990
Mejiro University
1983
Abstract Background Based on routine surveillance data, Japan has been affected much less by COVID‐19 compared with other countries. To validate this, we aimed to estimate SARS‐CoV‐2 seroprevalence and examine sociodemographic factors associated cumulative infection in Japan. Methods A population‐based serial cross‐sectional seroepidemiological investigation was conducted five prefectures December 2021 (pre‐Omicron) February–March 2022 (Omicron [BA.1/BA.2]‐peak). Anti‐nucleocapsid anti‐spike...
This paper presents a formulation and some calculations for the three dimensional analysis of RF electromagnetic fields by using finite element method. We adopted penalty method to obtain an approximate solution stationary Maxwell equations. The discussion is focused on waves as linear eigenvalue problem, which primitive variable approach based electric field, E, given. confirmed validity this two developed calculation code MAX3D. Satisfactory results are obtained rectangular cavities,...
This paper proposes a new walking and jumping robot, that is expected to get over large debris in the disaster area which difficult move around by ordinary robot find out victims efficiently as rescue operation. To acquire stability on uneven terrain landing, designed legs widely spread like spiders. The are consists of 4-bar linkage driven pair pneumatic cylinders momentarily produce high power speed. At this time, basic performance cylinder verified for use. Moreover one leg model...
The authors demonstrate the effectiveness of a method which uses Nedelec's tetrahedral elements for finite-element approximations mixed formulations three-dimensional magnetostatic problems. fundamental unknown function can be magnetic field intensity (H-method) as well vector potential (A-method). A verification problem established by Institute Electrical Engineers Japan is solved with these methods. Also, practical test H-method shown. It shown that produces fairly good results within...
The discovery of highly divergent lineages hantaviruses (family Hantaviridae) in shrews, moles, and bats multiple species raises the possibility that non-rodent hosts may have played a significant role their evolutionary history. To further investigate this prospect, total RNA was extracted from RNAlater®-preserved lung tissues 277 (representing five families, 14 genera 40 species), captured Myanmar Vietnam during 2013–2016. Hantavirus detected two 15 black-bearded tomb (Taphozous...
The discovery of genetically distinct hantaviruses (family Hantaviridae) in multiple species shrews, moles and bats has revealed a complex evolutionary history involving cross-species transmission. Seewis virus (SWSV) is widely distributed throughout the geographic ranges its soricid hosts, including Eurasian common shrew (Sorex araneus), tundra tundrensis) Siberian large-toothed daphaenodon), suggesting host sharing. In addition, genetic variants SWSV, previously named Artybash (ARTV) Amga...
Abstract The recent discovery of genetically distinct shrew- and mole-borne viruses belonging to the newly defined family Hantaviridae (order Bunyavirales) has spurred an extended search for hantaviruses in RNAlater®-preserved lung tissues from 215 bats Chiroptera) representing five families (Hipposideridae, Megadermatidae, Pteropodidae, Rhinolophidae Vespertilionidae), collected Vietnam during 2012 2014. A identified hantavirus, designated Đakrông virus (DKGV), was detected one two...
Murid and cricetid rodents were previously believed to be the principal reservoir hosts of hantaviruses. Recently, however, multiple newfound hantaviruses have been discovered in shrews, moles, bats, suggesting a complex evolutionary history. Little is known about genetic diversity geographic distribution prototype shrew-borne hantavirus, Thottapalayam thottimvirus (TPMV), carried by Asian house shrew (Suncus murinus), which widespread Asia, Africa, Middle East. Comparison TPMV genomic...
Hantaviruses are harbored by multiple small mammal species in Asia, Europe, Africa, and the Americas. To ascertain geographic distribution virus-host relationships of rodent-borne hantaviruses Japan, Vietnam, Myanmar, Madagascar, RNAlater™-preserved lung tissues 981 rodents representing 40 species, collected 2011–2017, were analyzed for hantavirus RNA RT-PCR. Our data showed Hantaan orthohantavirus Da Bie Shan strain Chinese white-bellied rat (Niviventer confucianus) Thailand; Anjo black...
Earlier, we demonstrated the co-circulation of genetically distinct non-rodent-borne hantaviruses, including Boginia virus (BOGV) in Eurasian water shrew (Neomys fodiens), Seewis (SWSV) common (Sorex araneus) and Nova (NVAV) European mole (Talpa europaea), central Poland. To further investigate phylogeny hantaviruses harbored by soricid talpid reservoir hosts, analyzed RNAlater®-preserved lung tissues from 320 shrews 26 moles, both captured during 1990-2017 across Poland, 10 moles Ukraine...
We have developed a program which computes the resonant frequencies and fields in an arbitrary shaped three dimensional cavity by finite element method. take electric field E = (Ex, Ey, Ez) as unknown variables solve eigenvalue problem for Maxwell equations time-harmonic case imposing boundary conditions. Divergence-free condition is treated approximately penalty show formulation analysis of RF electromagnetic some test calculations. Satisfactory results are obtained rectangular cavities,...
Yellow house bats (Scotophilus) have been known for centuries as a widespread genus of vesper in the Indomalayan Region. Despite this, their taxonomic status and phylogeographical patterns remain unclear due to differing criteria employed by early taxonomists inconsistencies between morphological molecular assessments. To address these issues, we undertook comparative phylogeographic analysis Asian Scotophilus spp. using integrated genetic analyses samples collected across region. These...
The house shrew (Suncus murinus-S. montanus species complex) is considered to have been unintentionally introduced by humans from their original range other regions around the Indian Ocean and neighboring seas, but this has yet not fully investigated. A phylogenetic tree haplotype network were reconstructed based on mitochondrial cytochrome b gene nucleotide sequences (1140 bp) of 179 individuals shrews 46 localities in southern East Asia, Southeast West islands western Ocean. There was...
Pigs are the most common amplifying hosts of Japanese encephalitis virus (JEV). In 2016, four residents on Tsushima Island who did not own pig farms were diagnosed with JE. Therefore, a serosurvey was conducted to estimate risk and seroprevalence JEV after outbreak. Sera collected from 560 between January September 2017 tested for neutralizing antibodies against strains JaGAr01 (genotype 3) Muar 5). six wild boars June July 2022 tested. The rates 38.8% 24.6%, respectively. High anti-JEV...
Background Rodent-borne orthohantaviruses are the causative agents of hemorrhagic fever with renal syndrome and hantavirus pulmonary syndrome. Apart from classic rodent-borne hantaviruses, numerous species hantaviruses have been identified in shrews bats; however, their antigenicity pathogenicity unknown. This study focused on developing a serological method to detect antibodies against bat- shrew-borne hantaviruses. Methodology/Principal findings Five bat-borne (Brno, Dakrong, Quezon,...
This paper presents the rediscovery of Van Hasselt’s Mouse-eared Bat Myotis hasseltii after nearly 50 years and its genetic data from Hanoi, northern Vietnam. In addition, a snapshot impacts urbanization on current distribution conservation status this native bat species in Hanoi is also provided.