A5034211519- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Plant and animal studies
- Genetic diversity and population structure
- Ecology and Vegetation Dynamics Studies
- HVDC Systems and Fault Protection
- Magnetic Properties and Applications
- Species Distribution and Climate Change
- ZnO doping and properties
- Superconductivity in MgB2 and Alloys
- Magnetic and transport properties of perovskites and related materials
- Plant Pathogens and Fungal Diseases
- Plant tissue culture and regeneration
- Berry genetics and cultivation research
- Soybean genetics and cultivation
- Yeasts and Rust Fungi Studies
- Forest Insect Ecology and Management
- Magnetic properties of thin films
- Metal and Thin Film Mechanics
- Plant Parasitism and Resistance
- Electric Motor Design and Analysis
- Legume Nitrogen Fixing Symbiosis
- Environmental DNA in Biodiversity Studies
- Advanced Condensed Matter Physics
- Ginger and Zingiberaceae research
Okayama University
2012-2024
Tamagawa University
2013-2016
Kyushu University
2010-2014
University of Tsukuba
2006-2014
Furukawa Electric (Japan)
1996-2010
Kirinyaga University
2010
University of British Columbia
2007-2009
Yokohama National University
2009
Washington State University
2006
Osaka Prefecture University
2000
Abstract While many plant species are considered threatened under anthropogenic pressure, it remains uncertain how rapidly we losing diversity. To fill this gap, propose a Global Legume Diversity Assessment (GLDA) as the first step of global diversity assessment. Here describe concept GLDA and its feasibility by reviewing relevant approaches data availability. We conclude that Fabaceae is good proxy for overall angiosperm in habitats much available. As indicators states, comparison richness...
High-dispersal rates in heterogeneous environments and historical rapid range expansion can hamper local adaptation; however, we often see clinal variation high-dispersal tree species. To understand the mechanisms of species' distribution, investigated adaptation adaptive plasticity a range-wide context Sitka spruce, wind-pollinated species that has recently expanded its after glaciations. Phenotypic traits were observed using growth chamber experiments mimicked temperature photoperiodic...
While habitat fragmentation is a central issue in forest conservation studies the face of broad-scale anthropogenic changes to environment, its effects on contemporary mating patterns remain controversial. This partly because inherent variation which may exist within species and fact that few have replication at landscape level. To study effect patterns, including effective pollen dispersal, we compared four native populations Australian tree, Eucalyptus globulus. We used six microsatellite...
Because mating system can be influenced by effective neighborhood size, density, and isolation, populations at range peripheries may differ from those in the center. The importance of peripheral to conservation evolution is controversial, additional information about their genetic structure evolutionary dynamics will inform strategies. In wind‐pollinated species, selfing rate generally negatively correlated with population size inbreeding therefore increase toward peripheries. Picea...
The critical current density (Jc) at 77 K and in 0 T of more than 3000 A/cm2 has been obtained the silver sheathed Bi-Pb-Sr-Ca-Cu-O tape fabricated by combination process sintering intermediate cold working. decrease Jc with increasing magnetic field is much smaller prepared this that only. improvement attributed to coupling between grains high Tc phase. enhances formation phase produces a highly oriented grain structure. These are considered be responsible for large coupling.
In the multilayer conductor, inner layers have higher impedance than outer layers. As a result, current concentrates in Our early study showed that its AC losses were reduced to one-tenth by making of each layer uniform. From such point view, trial realize uniform distribution was made adjusting winding pitches high-temperature superconducting (HTS) tapes layer. A 1 m long conductor fabricated, where had longer pitch Experimental results currents flowing individual almost same and this lower...
The Zingiber species comprises rhizomatous plants with special significance due to their multiple uses. Previously, we reported the additional use and suitability of primer pairs rice microsatellite markers as RAPDs for diversity assessment in representative accessions diverse taxa family Zingiberaceae. current study aimed investigate genetic structure Z. officinale at a genebank, small-scale subsistent farms commercial markets, relationships three species. A difference among inter-specific...
The margins of a species’ range might be located at the niche, and in such cases, can highly vulnerable to climate changes. They, however, may also undergo significant evolutionary changes due drastic population dynamics response changes, which increase chances isolation contact among species. Such species interactions induced by could then regulate or facilitate further responses climatic We hypothesized that lead contacts subsequent genetic exchanges differences boundaries. sampled two...
The Bi-based oxide superconducting tapes containing high-Tc (Tc=110 K) and low-Tc(Tc=85 phases were prepared by the powder metallurgy method using an Ag sheath, Jc was measured at 77 4.2 K in magnetic fields up to 30 T. A grain-oriented microstructure with c axes perpendicular tape surface obtained for a phase applying combination of cold rolling sintering. significantly improved this grain orientation. However, large anisotropy respect field direction observed these textured tapes. For...
In rugged terrain subject to active geomorphological processes, the species composition of forest communities changes along topographic gradients over short distances. However, phylogenetic structure forests on has rarely been examined. Understanding such structures provides insight into community assembly rules dependent local environmental conditions. To this end, we tested trends measurements [net relatedness index (NRI) and nearest taxon index] in a catchment covered by temperate with...
The thermal behavior of current leads using an oxide superconductor for the low-temperature portion has been studied. Numerical calculations predict a reduction necessary coolant flow rate and refrigerator input power. A pair manufactured where consists six sintered Bi compound cylindrical bars high-temperature Cu wire bundle. lead, cooled by gaseous helium along its entire length, is 0.9 m long designed to carry 1 kA. have tested in same arrangement as practical applications. hold...
The issue of design motor core is that the estimated iron losses and measured ones are sometimes different. One causes magnetic deterioration electrical steel sheet by bolt bundles, etc. We properties when compressive stress in thickness direction impressed on nonoriented sheet. In this paper, ring, semicircular strip under measured. different behavior various specimens discussed. It shown loss ring specimen can be reduced stress.
Abstract Understanding ontogenetic differences in plant defenses and herbivory damage is crucial for obtaining a better understanding of life‐history strategies, community assembly, dynamics. Although many studies have compared or between stages (e.g. sapling vs. adult), how the effects characteristics on leaf change during ontogeny has rarely been examined across species species‐rich natural community. To elucidate characteristics, we relationships by insects with stem density, size, traits...
Abstract We examined genetic variation in 22 accessions belonging to 11 species four genera of the Zingiberaceae, mainly from Myanmar, by PCR–restriction fragment length polymorphism analysis investigate their relationships within this family. Two 10 chloroplast gene regions ( trnS‐trnfM and trnK2 – trnQr ) showed differential PCR amplification across taxa. Restriction enzyme digestion products revealed interspecific variability. The restriction patterns were used classify as either highly...
Transgenic products and the creation of new organisms with innovative transgenic traits generally raise risk assessment concerns because potential risks to nontarget organisms. Cartagena Protocol on Biosafety Japanese government regulations require scientific environmental assessments living modified prior release avoid adverse effects environment. Soil microorganisms, such as arbuscular mycorrhizal fungi, aid in plant nutrient acquisition protection from stresses salt stress. In this study,...
The Ryukyu wild boar (Sus scrofa riukiuanus) is an endemic, morphologically defined subspecies of the Eurasian (S. scrofa) found on five islands Archipelago (a group small stretching from mainland Japan to Taiwan). Two hypothetical scenarios have been proposed regarding origin current populations: 1) natural dispersal and 2) transportation subsequent release by prehistoric humans. To test these two hypotheses, we compared mitochondrial cytochrome b gene sequence (1140 base pairs) in 352...
Abstract An important parameter of Josephson junctions (JJs) is the product normal state resistance ( R n ) and critical current I c for designing superconductor analogue devices or digital circuits. Determination from voltage – U–I characteristic curves often faces difficulties; in particular considerably reduced by intrinsic thermal extrinsic electrical noises. Here, we propose a standard measurement method ci high- T (HTS) grain boundary JJs operated liquid nitrogen low- (LTS) multilayer...