A5100762650- Landslides and related hazards
- Liquid Crystal Research Advancements
- Hydrology and Watershed Management Studies
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Cryospheric studies and observations
- Flood Risk Assessment and Management
- Photonic Crystals and Applications
- Electrocatalysts for Energy Conversion
- Soil and Unsaturated Flow
- Electrochemical Analysis and Applications
- Tree Root and Stability Studies
- Fire effects on ecosystems
- Geotechnical Engineering and Analysis
- Advanced Optical Imaging Technologies
- Advanced optical system design
- Dam Engineering and Safety
- Color Science and Applications
- Photonic and Optical Devices
- Groundwater flow and contamination studies
- Semiconductor materials and devices
- Photochemistry and Electron Transfer Studies
- Semiconductor Lasers and Optical Devices
- Molecular Junctions and Nanostructures
- Molecular spectroscopy and chirality
University of Tsukuba
2019-2024
National Institute for Land and Infrastructure Management
2011-2022
Sendai National College of Technology
2010-2021
National Institute of Technology
2021
JEOL (Japan)
2018
Ministry of Land, Infrastructure, Transport and Tourism
2018
Shinshu University
2016-2017
Kitasato University
2017
Hokkaido University
2006-2016
Public Works Research Institute
2008-2014
Electro-oxidation of formic acid on Pt in is one the most fundamental model reactions electrocatalysis. However, its reaction mechanism still a matter strong debate. Two different mechanisms, bridge-bonded adsorbed formate and direct HCOOH oxidation mechanism, have been proposed by assuming priori that major reactant. Through systematic examination over wide pH range (0-12) cyclic voltammetry surface-enhanced infrared spectroscopy, we show ion reactant whole examined, even acid. The...
A bridge too far: Time-resolved surface-enhanced infrared spectroscopy (SEIRAS) coupled with chronoamperometry shows that formic acid is oxidized via bridge-bonded adsorbed formate, and formate decomposition the rate-determining step in electrooxidation of to CO2 on Pt. The contribution direct oxidation weakly HCOOH negligible at best. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They...
Abstract We present a new, seismologically consistent expression for the total area and volume of populations earthquake‐triggered landslides. This model builds on set scaling relationships between key parameters, such as landslide spatial density, seismic ground acceleration, fault length, earthquake source depth, moment. To assess we have assembled normalized catalog inventories 40 shallow, continental earthquakes. Low landscape steepness causes systematic overprediction When this effect...
Abstract. Rainfall-induced landslides are a common and significant source of damages fatalities worldwide. Still, we have little understanding the quantity properties landsliding that can be expected for given storm landscape, mostly because few inventories rainfall-induced caused by single storms. Here present six new comprehensive landslide event coincident with well identified rainfall events. Combining these datasets, two previously published study their statistical relations to...
Recent studies have demonstrated the importance of water movement through bedrock in rainfall‐runoff process on steep hillslopes. However, quantitative information this is still limited. The objective study was to address following questions: (1) How large area where groundwater seeps into soil layer, and (2) what rate flow out bedrock? To these questions, detailed hydrological, hydrochemical, thermal measurements were conducted at a forested unchanneled granitic concave slope Tanakami...
Despite the significance of phosphate buffer solutions in (bio)electrochemistry, detailed adsorption properties anions at metal surfaces remain poorly understood. Herein, quasi-Au(111) prepared by a chemical deposition technique has been systematically investigated over wide range pH surface-enhanced infrared absorption spectroscopy ATR configuration (ATR-SEIRAS). Two different pH-dependent states adsorbed are spectroscopically detected. Together with DFT calculations, present study reveals...
Abstract Storm‐induced landslides are a common hazard, but the link between their spatial pattern and rainfall properties is poorly understood, mostly because hillslope stability modulated by under‐constrained, spatially variable topographic, hydrological, mechanical properties. Here, we use long‐term data set from Japanese radar network to discuss why landslide caused major typhoon correlates with event agrees normalized 10‐year return period amount, that is, anomaly. This may be explained...
It has been suggested that pipe flow and bedrock groundwater play important roles in storm runoff generation. We examined the effects of on generation rainfall‐runoff phenomena a steep headwater catchment central Japan. Measurements pore water pressures, flow, streamflow showed when total rainfall amount was <30 mm, process could be explained by Darcy's law using saturated hydraulic conductivity values core samples. When >70 dominant shifted to flow. Temperature measurements indicated...
Abstract One of the most important problems with ferroelectric liquid crystals is obtaining homogeneous as well bistable alignment, not only to study their physical characteristics but also for application optical devices. In this connection it was predicted that formation alignment requires strong surface anchoring, whereas bistability weak anchoring. We have therefore developed a method determine anchoring strength, and tried clarify whether there suitable range. It found A/K 22 (A K twist...
Abstract Eight modes of the guest-host cells (GH-cells), in which types dye, liquid crystal and their alignments are adequately combined, surveyed, color contrast each mode is calculated. Three among them positive type display, that is, colored patterns on colorless background contrary to initially proposed fundamental GH-cell. Another three GH-cells without polarizer, by bright display can be obtained. Light stability dyes also discussed lifetimes various estimated accelerated life test. As...
Transit time of discharge is a hydrological characteristic used in water resource management. Previous studies have demonstrated large spatial variation the mean transit (MTT) stream base flow meso‐scale catchments. Various relationships between topography and MTT been reported. Although it generally assumed that controlled by depth hydrologically active layer recharges stream, this hypothesis has not tested field studies. This study confirmed soil bedrock controls MTT. The isotopic...
Abstract Landslide‐induced debris flows can travel long distances. Many field studies, laboratory experiments, and theoretical studies have been conducted to clarify the mechanisms of long‐runout landslides. However, information concerning landslide‐induced is still inadequate despite several explanations proposed. Thus, we collected various forms data, including video images light detection ranging for a flow that occurred on 28 July 2015, in Fukaminato River, Japan, clarified behavior from...
A novel local strained channel (LSC) MOSFET has been fabricated by a stress control technique utilizing poly silicon gate electrode. The residual compressive in arsenic (As) implanted polysilicon is induced high temperature annealing of CVD SiO/sub 2/ cap with tensile stress. On the other hand, boron (B) free from As result, only n-channel region locally drain current LSC nFETs improved 15% compared to that conventional nFET without degradation pFET current. High performance 55nm CMOSFET...
Until recently, there have been few attempts to link hillslope, headwater and meso-scale hydrology. However, the paper by Shaman et al. (2004, Hydrological Processes 18: 3195–3206) has proposed concepts that basins. Although their provides an excellent example of how we should make connections between small- large-scale hydrology, analysis still lacked sufficient consideration spatial variability hydrological behaviour at hillslope/headwater scale. Here, extend discussion smaller sized...
Abstract It is found theoretically and experimentally that a linear relationship between capacitance reciprocal voltage of nematic liquid crystal cell homogeneous alignment. From this slope, the ratio elastic constants K33/K11 can be acculatly obtained.