A5007969147- Geotechnical Engineering and Soil Stabilization
- Geotechnical Engineering and Underground Structures
- Peatlands and Wetlands Ecology
- Grouting, Rheology, and Soil Mechanics
- Fire effects on ecosystems
- Earthquake and Tsunami Effects
- Geotechnical Engineering and Soil Mechanics
- Coastal and Marine Dynamics
- Plant Water Relations and Carbon Dynamics
- Coastal wetland ecosystem dynamics
- Fluid Dynamics Simulations and Interactions
- Aeolian processes and effects
- Plant Ecology and Soil Science
- Remote Sensing and Land Use
- earthquake and tectonic studies
- Fatigue and fracture mechanics
- Welding Techniques and Residual Stresses
- Landfill Environmental Impact Studies
- Engineering Applied Research
- Landslides and related hazards
- Geotechnical Engineering and Analysis
- Geology and Paleoclimatology Research
- Tree Root and Stability Studies
- Metallurgy and Material Forming
- Nuclear Materials and Properties
Hokkaido University of Science
2009-2024
Port and Airport Research Institute
2012-2024
Toshiba (Japan)
1993-2024
Fujifilm (Japan)
2023
The University of Tokyo
1990-2022
University of Toyama
2021-2022
National Maritime Research Institute
2022
Hokkaido Institute of Public Health
2004-2021
Saiseikai Utsunomiya hospital
2021
Rigaku (Japan)
2021
Abstract A tropical ombrotrophic peatland ecosystem is one of the largest terrestrial carbon stores. Flux rates dioxide (CO 2 ) and methane (CH 4 were studied at various peat water table depths in a mixed‐type swamp forest floor Central Kalimantan, Indonesia. Temporary gas fluxes on microtopographically differing hummock hollow surfaces combined with data to produce annual cumulative flux estimates. Hummocks formed mainly from living dead tree roots decaying debris maintained relatively...
Peat fire in tropical peatland not only releases a large amount of carbon into the atmosphere, but also causes significant damage to ecology and landscape. It is important understand peat establish more effective methods control fire. In this paper, results field laboratory research elucidate combustion thermal characteristics Field studies were carried out at 9 study plots actual areas along Trans Kalimantan Highway Central 2002. Laboratory analyses using bomb calorimeter TG-DTA obtain low...
Abstract Tropical peatlands have accumulated huge soil carbon over millennia. However, the pool is presently disturbed on a large scale by land development and management, consequently has become vulnerable. Peat degradation occurs most rapidly massively in Indonesia, because of fires, drainage, deforestation swamp forests coexisting with tropical peat. burning releases dioxide ( CO 2 ) intensively but occasionally, whereas drainage increases emission steadily through acceleration aerobic...
Multiple system atrophy (MSA) is a neurodegenerative disorder characterized by prominent autonomic failure with ataxia and/or parkinsonism. The leading cause of death in MSA sudden death. We have shown that the early development an independent risk factor for depletion sympathetic preganglionic neurons spinal intermediolateral cell column (IML) and its afferent medullary catecholaminergic serotonergic has been proposed to be partly responsible MSA. In this study, we investigated whether any...
Abstract In general, it is known that extreme climatic conditions such as El Niño and positive Indian Ocean Dipole (IOD+) cause prolonged drought in Indonesia's tropical peatlands so groundwater levels (GWL) drop peat prone to fire. However, 27 years of GWL measurements Central Kalimantan forests show the opposite condition, where lowest occurs several weeks before after IOD+ reaches its peaks. We dropped sea surface temperature anomaly induced by anomalously easterly winds along southern...
This paper introduces the RoboCup-Rescue Simulation Project, a contribution to disaster mitigation, search and rescue problem. A comprehensive urban simulator is constructed on distributed computers. Heterogeneous intelligent agents such as fire fighters, victims volunteers conduct activities in this virtual world. real world interface integrates various sensor systems controllers of infrastructures cities with Real-time simulation synchronized actual disasters, computing complex...
Abstract This paper describes the implicit integration and consistent tangent modulus of an inelastic constitutive model with transient steady strain rates, both which are time‐ temperature‐dependent; rate is influenced by evolution back stress decomposed into parts, while depends only on applied temperature. Such a non‐unified useful for high‐temperature structural analysis practical owing to ease in determining material constants. The shown result two scalar‐valued coupled equations,...
The original objective of theMega Rice Project (MRP) in CentralKalimantan, Indonesia – to convert onemillion hectares tropical swamp forest paddy fields instead produced large areas abandoned farmland with bare peat subject frequent fires. To understand how fire occurrence is related drought, we analyzed 1997 2007 United States Department Commerce National Oceanic and Atmospheric Administration (NOAA) hotspot data, sea surface temperature (SST) anomalies, weather data. We found that activity...
1 The influence of tephra (aerially transported volcanic ejecta) on mire vegetation was investigated in a field experiment at Sarobetsu Mire, northern Hokkaido, Japan, which simulated relatively thin, widespread tephras. It carried out the centre raised part Carex middendorffii–Sphagnum papillosum community. 2 We tested effects varying layer thickness, grain size and season impact. 3 Vegetation surveys analyses pore water were before years after application. Redox potential, oxygen...
Land use change in tropical peat soil is thought to cause intense greenhouse gas emissions by enhancing organic matter decomposition. Although microbes play key roles the emission of gases, their characteristics remain unknown. This study was conducted clarify effect land (drainage, forest fire and agricultural use) on control factors with respect soils. Field observations were carried out Central Kalimantan, Indonesia, from July 2009 March 2011. Carbon dioxide (CO2) nitrous oxide (N2O)...
Abstract A land surface water deficit model was developed for a large-scale heterogeneous arid and semiarid area with various soil, vegetation, use types, used to simulate seasonal spatial variability in potential (E0) actual (Ea) evapotranspiration an index of (WDI). Comparisons the results other commonly models natural vegetation conditions suggest that this can give estimate success regional studies. By using model, authors estimated E0, Ea, WDI grid cell 0.25° lat × long over Loess...