A5019242592- Soil Moisture and Remote Sensing
- Soil and Unsaturated Flow
- Climate change and permafrost
- Cryospheric studies and observations
- Geophysical Methods and Applications
- Fluorine in Organic Chemistry
- Geothermal Energy Systems and Applications
- Inorganic Fluorides and Related Compounds
- High voltage insulation and dielectric phenomena
- Organoboron and organosilicon chemistry
- Vacuum and Plasma Arcs
- Electrostatic Discharge in Electronics
- Computational Drug Discovery Methods
- Viral Infectious Diseases and Gene Expression in Insects
- Organophosphorus compounds synthesis
- Catalytic Processes in Materials Science
- Organoselenium and organotellurium chemistry
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Turbulent Flows
- Flow Measurement and Analysis
- Pulsars and Gravitational Waves Research
- Groundwater flow and contamination studies
- Supramolecular Self-Assembly in Materials
- Drug Solubulity and Delivery Systems
- Sulfur-Based Synthesis Techniques
Osaka University
2020-2025
Graduate School USA
2025
Chiba University
2021-2024
Gifu University
1990-2023
Tokyo Institute of Technology
2023
Yokohama National University
2021-2023
Nagoya University
2008-2022
Nihon University
2012-2022
Kinjo Gakuin University
2021
Hiroshima University
2021
KAGRA is a newly built gravitational wave observatory, laser interferometer with 3 km arm length, located in Kamioka, Gifu, Japan. In this series of articles, we present an overview the baseline KAGRA, for which finished installing designed configuration 2019. This article describes method calibration (CAL) used reconstructing signals from detector outputs, as well characterization (DET). We also review physical environmental monitors (PEM) system and geophysics (GIF). Both are...
Soil moisture is an important property for agriculture, but currently commercialized soil sensors are too expensive many farmers. The objective of this study to develop a low-cost sensor using capacitors on film substrate and capacitive touch integrated circuit. performance the was evaluated in two field experiments: grape mizuna greenhouse field. developed captured dynamic changes at 10, 20, 30 cm depth, with period 10-14 days required after installation contact between settle down....
CuGaS2, (AgInS2)x-(ZnS)2-2x, Ag2ZnGeS4, Ni- or Pb-doped ZnS, (ZnS)0.9-(CuCl)0.1, and ZnGa0.5In1.5S4 showed activities for CO2 reduction to form CO and/or HCOOH in an aqueous solution containing K2SO3 Na2S as electron donors under visible light irradiation. Among them, CuGaS2 Ni-doped ZnS photocatalysts relatively high formation, respectively. was applied a powdered Z-scheme system combining with reduced graphene oxide (RGO)-incorporated TiO2 O2-evolving photocatalyst. The produced from...
A copper hydride (CuH)-catalyzed regio- and enantioselective hydroboration of 1-trifluoromethylseleno (SeCF3)-alkenes with H-Bpin has been developed. The hydrocupration an in situ generated CuH species is followed by a boration reaction to successfully construct SeCF3- Bpin-substituted chiral carbon center. key success the appropriate choice tBu-modified biphosphine ligands, which enables overwhelming high efficiency.
A copper‐catalyzed regio‐ and enantioselective hydroallylation of 1‐trifluoromethylthioalkenes with hydrosilanes allylic electrophiles has been developed. The judicious choice chiral ligands successfully promotes the C(sp3)–C(sp3) bond formation at α‐position trifluoromethylthio (SCF3) group, which is otherwise difficult to perform by other means. Experimental computational mechanistic studies reveal that leaving groups significantly influence enantioselectivity as well chemoselectivity.
Core Ideas Soil ice content is difficult to quantify. A sensible heat balance with pulse probes may indicate soil contents. can determine transient from −5 0°C. contents below −5°C be determined capacity changes. Heat monitor at and an important component for winter hydrology. The (SHB) method using measurements (HPPs) a possible way content. In previous study, in situ estimates the SHB were inaccurate, due thermal conductivity errors use of relatively long time steps calculations. objective...
A Cu-catalyzed regio- and enantioselective hydroallylation of 1-trifluoromethylalkenes with hydrosilanes allylic chlorides has been developed. An in situ generated CuH species undergoes the hydrocupration enantioselectively to form a chiral α-CF3 alkylcopper intermediate, which then leads optically active hydroallylated product. The key success is use not only an appropriate bisphosphine ligand but also 18-crown-6 suppress otherwise predominant β-F elimination from intermediate. asymmetric...
Abstract A synthetic method for preparation of optically active trifluoromethylthio (SCF 3 ) compounds by a copper‐catalyzed regio‐ and enantioselective hydroboration 1‐trifluoromethylthioalkenes with H‐Bpin has been developed. The hydrocupration an in situ generated CuH species subsequent boration reaction generate chiral SCF ‐containing alkylboronate, which Bpin moiety can be further transformed to deliver various molecules. Computational studies suggest that the group successfully...
The reaction kinetics of the CO 2 absorption by Ba Fe O 5 , which shows a reversible with represented as + ⇄ 3 4 was investigated thermogravimetry under various partial pressures [ P ( )s]. calculated Ellingham diagram found to show agreement variation in equilibrium temperature ). results morphology observation, specific surface area analysis, and TG measurement suggested that mechanism is described superficial reaction, diffusion‐controlled process, sintering proceeds. for process has been...
Soil ice content impacts winter vadose zone hydrology. It may be possible to estimate changes in soil with a sensible heat balance (SHB) method, using measurements from pulse (HP) sensors. Feasibility of the SHB method is unknown because difficulties measuring thermal properties partially frozen soils. The objectives this study were (i) examine for determining situ content, and (ii) evaluate required accuracy HP sensors use method. Heat installed bare field measure temperatures during...
Tangent-line methods and adaptive waveform interpretation with Gaussian filtering (AWIGF) have been proposed for determining reflection positions of time domain reflectometry (TDR) waveforms. However, the accuracy those is limited short-probe TDR sensors. Second-order bounded mean oscillation (BMO) may be an alternative method to determine For this study, algorithm second-order BMO developed. Example waveforms are analyzed tangent-line methods, AWIGF method, illustrate difference among three...
A palladium-catalysed, silver-assisted C2–H alkenylation of benzophospholes with terminal alkenes has been developed to form the corresponding benzophosphole–vinylene conjugations.
The purpose of this study is to determine the process parameters laboratory-scale spray dryer affecting solubility behavior and physical stability solid dispersions.Solid dispersions model drug (nilvadipine or nifedipine) hypromellose (HPMC) (w/w: 1/1) were prepared using dryer. As parameters, nitrogen flow rate, sample concentration pump speed investigated. samples characterized by dissolution tests, powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), electron...
Core Ideas • A new method for analyzing TDR waveforms is presented. The provides consistent results on obtained from short probes. stable enough automatic implementation large sets of waveforms. Tangent line (TL) methods and the second‐order bounded mean oscillation (BMO) have been proposed determining reflection positions time domain reflectometry (TDR) waveforms, especially short‐probe sensors. However, accuracy TL limited by multi‐reflection effects sensor, an BMO challenging because...
Owing to the increasing popularity of smart agriculture in recent years, it is necessary develop a single sensor that can measure several soil properties, particularly water content and matric potential. Therefore, this study, we developed simultaneously (θ), electrical conductivity (σb), temperature, potential (ψ). The proposed determine θ σb using time domain transmissiometry ψ based on capacitance accompanying ceramic plate. A series laboratory field tests were conducted evaluate...
In situ determination of soil freezing and thawing is difficult despite its importance for many environmental processes. A sensible heat balance (SHB) method using a sequence pulse probes has been shown to accurately measure water evaporation in subsurface soil, it the potential thawing. Determination may be more challenging than evaporation, however, because latent fusion smaller vaporization. Furthermore, convective flow associated with liquid occurrence or condensation during cause...
Abstract Soil bulk density (ρ b ) is commonly treated as static in studies of land surface dynamics. Magnitudes errors associated with this assumption are largely unknown. Our objectives were to (a) quantify ρ effects on soil hydrologic and thermal properties (b) evaluate energy balance heat water transfer. We evaluated 6 properties, volumetric capacity, conductivity, diffusivity, retention characteristics, hydraulic vapour over a range , using combination models. Thermal retention,...