研究者/研究室一覧
A
environmental microbiology, applied microbiology
1. Microbial degradation of persistent flame retardants
2. Physiological roles and applications of D-amino acid-metabolizing enzymes
3. Genetic engineering of applicable yeasts
Auto-monitoring system of wildlife animals, Auto-detecting system of wildlife animals.
1. Hybridization and Application of Bio-Related Materials
2. Biosensing with Enzyme-Immobilized Electrodes
3. Biosensing with Quartz Crystal Microbalance
4. Biological Fuel Cell
biophysics, bioimaging, biosensor, protein science
Medical engineering ergonomics welfare engineering
・biologically inspired cognitive architecture
・behavior selection
・perception-motor integrated human-machine interface
・skill education
・network ecology
Visualizing tie between people. For example,1 visualization of entrepreneurial networks and the process of town formation. At the same time, this will clarify how humans’ behavior changes depending on mountains, rivers, and railways. As for the theme with the students, 2 Development of a system to enhance mutual learning and learning effects between elementary, junior high and high schools, which not only leads to mutual learning but also early detection of bullying. 3 Research on public relations activities using SNS.
1.Innovation Management
2.Market Strategy in Emerging Countries
3.Manufacturing Management on Site
Radiation Application:
1.Environmental chemistry application of pulsed intense charged particle beam, 2.Biological effect of pulsed intense charged particle beam
Plasma and Nuclear Fusion:
1.Dense plasma generation and measurement by pulsed power device, 2.Reactor material of nuclear fusion, 3.Fundamental research for nuclear fusion power generation
Beam Physics and Engineering:
1.Dynamics analysis of particle beam, 2.Pulsed charged particle beam generation and application using induction accelerator
Multi-physics simulation
Numerical scheme
Numerical simulation
Control, Estimation, Identification simulation
Water Radiolysis
In our laboratory, we possess one-of-a-kind technologies such as nanocomposite technology, nanosecond pulse technology, pressure-sensitive sensing technology, and energy conversion technology from fluctuating heat sources. Using these technologies, we are conducting research using our own original devices. In particular, in recent years, we have been working on research on structural control technology for ceramics, robot control technology using AI, measurement and control technology using IoT devices, and environmental purification technology.
Engineering General: Fundamental Study on Engineering
1. Tribology:
Optimization of electrical sliding contacts
Lubrication characteristics of artificial joints
Lubrication characteristics of hydrophobic surfaces
2. Rotordynamics
Static and dynamic characteristics of annular seals
Static and dynamic characteristics of journal bearings
Production Engineering, Machine Tool, Manufacturing and Composite Material
(1) Fundamental Study and Applications of AC/AC Direct-Conversion Circuit (Matrix Converter)
(2) Development of High-Efficiency DC/DC Converter
(3) Performance Improvement of Input-Current-Distortion-Reduction Circuit
(4) Performance-Enhanced Control of Induction Motor and Permanent Magnet Electric Motor
(5) Advanced Digital Control
(6) Simplification of Multilevel Converter
(7) Development of High-Efficiency Power Conversion System
(8) Energy Storage System
(9) Wireless Power Transfer
Solar Energy, Photovoltaic System, Thermodynamic Cycle, Energy Storage, Heat Transfer, Thermal Radiation
Shape optimization of aircraft, fluid machineries and so on
Development of efficient optimization approaches
Advanced flow measurement via Particle Image Velocimetry (PIV)
Data integration between experiment and simulation
Aerodynamic drag prediction, decomposition and visualization
Social surveys (quantitative/qualitative), workshop facilitation
Computer Supported Collaborative Learning
Groupware
Information Extraction from Text Data
Safety engineering
Control of electromagnetic waves using metamaterials
Glove box,Masterwave BTR
Living System
Animal Behavior
Embodied Cognition
1.Liquid-Gas Two-Phase Flow in Nucler Assemblies
2.Heat Transfer and Fluid Flow Simulation
3.Thermal-Hydraulics in Severe Accident with Core Meltdown
4.Feasibility on Thermal Engineering of Advanced Reactors
5.Hydrogen Controll in Nuclear Reactor Related Facilities
6.Metal Vapor Channeling Instability at Laser Irradiation Cutting
1. Intrinsic instability of premixed flame
2. Flame acceleration characteristics of hydrogen flame
3. Combustion characteristics of ionic liquid propellant
4. gasification characteristics and gasification technology of biomass
5. Catalytic combustor for biogas
6. Internal flow dynamics of canned motor pumps
7. Laser ignition
Ageing management of complex material systems
Risk-informed decision making of emergency preparedness
Nano-scale measurement and fabrication using electron & ion beam
Accident analysis and management improvement
Social systems engineering/Safety system
Disaster mitigation and earthquake damage prevention in consideration of local site effect and local seismicity
Innovation management, Marketing, Business model, Business model innovation, Sharing economy, Fintech
(1) Fabrication of nitride thin films by pulsed laser deposition and search for new functional materials
(2) Composition analysis of thin film by electrostatic accelerator
・Laser processing
・Micro/nano fabrication
・Microdevices
・Flexible devices
In our laboratory, we possess one-of-a-kind technologies such as nanocomposite technology, nanosecond pulse technology, pressure-sensitive sensing technology, and energy conversion technology from fluctuating heat sources. Using these technologies, we are conducting research using our own original devices. In particular, in recent years, we have been working on research on structural control technology for ceramics, robot control technology using AI, measurement and control technology using IoT devices, and environmental purification technology.
1. Observation of radiative freezing process
2. Continuous Ice Drawing method for high quality ice
3. Measurement of road snow / ice and snow melting technology
4. Elucidation of the collapse mechanism of road snow banks
5. Risk Analysis of Human Snow Damage
6. Development and promotion of technologies to reduce human snow damage
7. Analysis of requests and complaints for road snow removal.
8. Development of technology to utilize snow and ice cold heat as renewable energy
9. Social activities contributing to the revitalization of heavy snow regions
10. Elucidation of Antarctic ice sheet flow and analytical method of core drilling holes
Other engineering issues related to snow and ice
1. Operation of distributed generations with renewable energy
2. Control of grid-connected inverter supporting electrical grid inertia
3. Operation of energy storage system with battery to compensate power fluctuation
4. Development of rotational heat generator for thermal energy storage
5. Operation of Microgrid
1. Generation and modeling of network data using machine learning.
2. Development of accurate measurement techniques of communication quality.
3. Development of network simulation techniques.
1. Brain-Computer Interfaces (BCIs) using EEG
-BCIs for prediction of movement information
−BCIs using Virtual Sounds
-Machine learning, feature selection, and neural network analysis for improvement of the BCI performance
2. Signal processing for functional near-infrared spectroscopy (fNIRS)and its application to BCIs
-Systemic artiface removal from short-distance channels
−fNIRS-BCIs for prediction of movement information
3.Human motor control, motor learning, and myoelectric interfaces
-Muscle synergy analysis during reachnig movements
−Prediction of movements from muscle activities
4. Virtual Sound synthesis
− Individualization of the head-related transfer functions
1. Scanning Ion Conductance Microscopy using pore-forming proteins
2. Probe type nanopore sensors (Biological nanopore probe)
3. Bio sensors using microfluieic devices
4. Nanopore sensors using DNA nano structures
5. Environmental monitoring robots powered by insect biofule cells
We are engaged in research on perception, cognition, and behavior, focusing on the following themes.
・ Skill education: Construction of educational design based on human perception, cognition, and behavioral mechanisms
・ Perception / motor integrated interface: Interface design and evaluation suitable for human perception / cognition / motor behavior characteristics
・ Life / network behavioral ecology: Research on methods to elucidate and cause transformation of behavioral ecology in daily life situations
In this laboratory, we are conducting research to improve the motor performance using electromagnetic field analysis and experimental approaches as our core technologies. We are also researching next-generation electromagnetic design technology using AI and other techniques.
We are interested in observing desirable charactertistics of data sequences under certain circumstances, and proposing efficient schemes to generate data sequences with the characteristics. More precisely, we use graph thepry for fundamental analysis for data sequences, such as the number of desired data sequences or data-sequence generators.
1. Combustion diagnostics based on safety confirmation
2. Fire control and risk assessment
3. Fluctuation and chaos in flames
4. Smart control of lean combustion
5. Development of ultra-micro combustor
6. Chemical reaction of hydrogen
7. Explosion protection and international safety standards
Plasma equipment, various light sources such as lasers, photoelectrode / photocatalyst evaluation equipment, visible ultraviolet spectrophotometer, beads mill
Our laboratory conducts education and research on surface and interface chemistry of nanomaterials. In particular, our research interests focus on nanosheets based on surface and interface chemistry. Nanosheets can be considered as a unique class of nanomaterials, having an exceedingly two-dimensionality with a molecular thickness.
Organic and inorganic hybrid equipment
Shape optimization of aircraft, fluid machineries and so on
Development of efficient optimization approaches
Advanced flow measurement via Particle Image Velocimetry (PIV)
Data integration between experiment and simulation
Aerodynamic drag prediction, decomposition and visualization
Power analyzer (HIOKI, PW6001)
Oscilloscope (Tektronics, MDO34)
AC power supply (Kikusui, PCR6000WE2R)
DC power supply (headspring, biATLAS-D)
Partial discharge test (SOKEN)
・Multispectral camera
・Near-infrared camera
・Infrared thermography camera
・Heart rate interval measurement device
・Blood glucose sensor
・Numerical analysis software (Matlab)
・Laparoscopic surgery training box
1. Study on the collaboration between small modular reactors and variable renewable energy sources.
2. Development of code and simulator for SMR load-following analysis.
3. Study on nuclear battery and RTG for utilizing nuclear waste.
4. Development of criticality impact analysis method for the decomissioning of Fukushima Daiichi NPS.
In our laboratory, we study the analysis and evaluation of worker and machine behavior using quantitative measurements called Behavior Analysis (BA). In particular, we analyze human behavior using ABC model in BA. Also we are working to reinforce safe behavior and reduce unsafe behavior. We also examine why people engage in unsafe behavior using objective indicators such as human behavior and biomarkers, as well as subjective evaluation indicators such as well-being and stress. In addition, we are researching what procedures are needed to transform unsafe behavior into safe behavior.
Our laboratory researches theories and technologies related to the control and development of advanced mechatronics systems. In particular, we focus on robot control and haptics, including the guidance control of a robotic swarm composed of multiple robots and the development of systems to enhance human haptic perception or support motor learning (skill transfer). We are interested in various objectives, from artificial objects like machines to non-artificial objects like humans.
Nano-second pulsed supercontinuum light source
Python, SPSS, EZR, Google colaboratory
1. Heat-resistant commercial Mg alloy
2. Formable Mg alloy with medium strength and high ductility
3. High strength Mg alloy with press formability
4. Mg alloy with high toughness
5. Ultra-high-strength Mg alloy with heat resistance
In our laboratory, we have clarified the ”reasons why” found in companies with nanoscale such as high strength obtained in Al, Mg and Ti alloys and thermoelectric properties based on the nano and atomic scale analysis methods. We deal with Ti, Mg and Al alloys, Ni-base superalloys, themoelectric material and so on. So far, we are collaborating with Honda, Daido Steel, IHI, UACJ, SUS and other companies. Using X-ray, electrons and neutrons, materials properties in microscale are extracted.
Solar Energy, Photovoltaic System, Thermodynamic Cycle, Energy Storage, Heat Transfer, Thermal Radiation
(1) Fundamental Study and Applications of AC/AC Direct-Conversion Circuit (Matrix Converter)
(2) Development of High-Efficiency DC/DC Converter
(3) Performance Improvement of Input-Current-Distortion-Reduction Circuit
(4) Performance-Enhanced Control of Induction Motor and Permanent Magnet Electric Motor
(5) Advanced Digital Control
(6) Simplification of Multilevel Converter
(7) Development of High-Efficiency Power Conversion System
(8) Energy Storage System
(9) Wireless Power Transfer
1.Motor drive for high efficiency and high reliability
2.Power converter for high efficiency, low cpst, and small size
3.Power electronics for energy storage or PV system
Organic optoelectronics
1. Diffractive optical elements by using photo-reactive polymer liquid crystals
2. Structured anisotrophy control on liquid crystal polymer films by using nano-imprinting
3. Nonlinear effect of liquid crystal
4. High density optical memory based on vector holography
5. Multi-dimensional photo-alignment method by using vector holography
6. Optical wave control by using liquid crystal photonic structure
7. Development of snapshoto polarimeter by using vector diffraction grating
8. Three-dimensional anisocropic photonic optical elements
9. Multi-valued anisotropic diffractive optical elements by using polarized ultra-violet laser beam drawing method
10. Space variant photo-alignment of polarization sensitive materials by using singular light waves
11. Polarization imaging system
12. Development of nano-photolithography by using optical vortex beam
13. Mode demultiplexer of polarization vortex beam for high-density optical communication
1. Development of R2R method for organic electronic devices by printing method
2. Study on orientation control of molecules at interface
3. Development of fast response liquid crystal device
4. Liquid/solid interface observation by frequency-modulation atomic force microscopy
5. Measurement methods of liquid crystal device properties
6. Study on molecular interaction between organic functional material and liquid crystal material
thin film solar cell, photoluminescence spectroscopy, single crystal growth, thin film deposition under no vacuum condition
-Terahertz elements
-Optical elements
Chaos, Fractals, Biological information measuring, Sensibility information engineering, Neural network, BCI
1. Image/Video/Audio Signal Processing
2. 3D Image Processing / Robot Vision
3. Multimedia Information Retrieval / Recommendation
4. Social Media Analysis / Data Mining
1. QoS control techniques on TCP/IP networks.
- Development of fair bandwidth allocation methods on connections.
- A performance evaluation on a TCP/UDP mixed environment.
2. A quick connection admission control that guarantees packet loss rate.
- Effective bandwidth for a loss rate guarantee of packets.
- Large deviation theory.
3. Evaluation of delay in packet networks.
- An analysis by a continuous time Markov chain.
- Approximate conditions of a Markov model.
4. An analysis of stationary distributions of queue length and delay.
- An analysis of a stationary distribution applying complex analysis.
- A series expansion of a stationary distribution.
5. Development of a high-speed simulation method.
- A high-speed estimation method for rare packet losses.
- Importance sampling without knowledge of a random process.
6. Accurate measurement method of networks.
- Development of a low cost and accurate measurement tool for delay/loss.
- Non-bias delay measurement technique.
1.Computational Neuroscicence Researches for Human Motor Control
-Examination of Criteria for Human Arm Movements
-Trajectory Planning and Control for complex human arm/hand movements
2.Brain-Machine/Computer Interfaces (BMIs/BCIs) using EEG and fNIRS
-Auditory BCIs using Virtual Sounds (Out-of-Head Sound Localization)
-Reinforcement Learning using EEG signals
-Quantitative Evaluations of brain activity
-Prediction of Human Movement Parameters (force/Trajectory/Direction) using BMI/BCI
3.Communication using movement patters in humans
-Generation and Recognition of Gestures
4.Robot Skill Learning
-Efficient Uses of Virtual Space for Skill/Task Learning
1. Design and analysis of digital filters
2. Digital image processing
3. Acoustic and audio processing
Composite materials/Surface and interface engineering
Thin film/Surface and interfacial physical properties
Structural/Functional materials
Characterization of oxyde glass and glass-ceramics. In especially, electrical, optical, electrochemical, and mechanical properties of glass materials. We develop (1)acvibe materlas and devices for photonics application by transparent glass-ceramics with high-optical nonlinearlity, (2)micro laser-process to fabricate highly oriented crystal microwire in glass and (3)active materials for lithium/sodium ion battery.
General Chemistry
Organic electron transfer chemistry, Synthetic organic chemistry, Organic electrochemistry, Organic industrial chemistry
Recent research topic
1. Development of novel synthetic organic reactions through electron transfer from magnesium or electrode
2. Synthesis of partially fluorinated organic compounds
3. Development of green molecular transformation process
Nanobiomaterials
Shield tunnelling method, Pipe jacking method,
Mechanical properties of saturated and unsaturated soils, Deformation characteristics of soils in small strain, Liquefaction of sandy soils
・Structural analysis of steel structure
・Shape finding and structual analysis of suspension structure
・Evaluation of redundancy and residual strength of steel bride
・Evaluation of corrosion environment and corrosio rate
1. Concrete Materials and Structures
2. Prestressed Concrete
3. Steel-Concrete Hybrid Structures
Logistic model in urban area, Traffic congestion mitigation when holding large events, Traffic demand management and effect analysis, Public acceptance,
Parking management, Public transportation planning, Vacant houses and their management, Traffic analysis using big data,
Regional vitalization by ”MICHI NO EKI” , Measures to mitigate traffic congestion in developing countries
1.Numerical wave and flow simulation and Field Survey
2.Flood and Inundation
3.stability of river stuructures
research on applications of geospatial data which is acquired by remote sensing techniques and used for disaster prevention and mitigation in various fields:
- Monitoring crop growth using spectral and LiDAR sensors onboard satellites and UAVs
- Estimating forest parameters derived from LiDAR observation data
- Extraction of snow covered areas using satellite data
- Development of the LiDAR-based system for measuring snow on roads and shoulders.
Biological waste/wastewater treatment, Microbial community analysis, Microbial detection and monitoring,
Our laboratory conducts education and research in the area of applied science to improve plants for the benefit of humans. For this purpose, from the viewpoint of investigating plants, propagation of plants, improving plants, and using plants, we are conducting research from engineering to agronomy, basic and applied research.
1. Plant epigenetics,
2. Plant genetic engineering
当研究室では安全ビッグデータを対象としたデータサイエンス研究を行っています.国際安全規格などの安全知識をベースとして、安全データのオントロジー研究に取り組んでおり、安全データプラットフォームの開発および企業のリスクマネジメントへの応用研究へ力を入れています。また、最近では、レジリエンスエンジニアリングに関する研究も行っています。
本研究室では、情報科学を用いた計測工学・制御工学における新技術の可能性を探ることを主眼に研究活動を行っています。また、基礎技術として、応用光学、計測工学や制御工学などの教育にも力をいれています。
(ア)本研究に関連する国内・国外の研究動向及び位置づけ
スーパーハイビジョンや3D 映像等の大規模コンテンツや,放送局などに保存されるアーカイブ情報,医療機関で蓄積されるCT やMRI などの医療生体画像データの巨大化により,大規模かつ超高速に情報データを記録再生できるエネルギー消費量の少ない情報ストレージ装置が求められている.
我々のグループは,2000 年に開始したJST のCREST 事業(代表者:井上光輝)で,従来は2 光束方式(図1)で実用が困難であったホログラムメモリを,見かけ上1 本の光ビームでホログラムが記録再生できるコリニア方式ホログラムメモリ(図2)の開発に着手し,2005 年に連続回転する光ディスクにDVD ライクにホログラム情報記録ができることを世界で初めて示した(図3).このホログラムメモリは,DVD サイズの光ディスクに最大3 TB に達する大容量の情報を1 Gpbs の高速で記録再生でき,次世代光メモリとして極めて有望である.実際,このコリニア方式ホログラムメモリは,Ecma International の国際標準化組織で世界初のホログラムメモリ国際標準として承認された.
上述の成果を踏まえて2005 年に開始した文部科学省キーテクノロジー事業では,光位相を用いた多値体積記録ホログラムメモリの開発を行い,記録密度と転送レートが最大で16 倍に達することを原理実証した.
(イ)着想に至った経緯
しかし,上述のホログラムの記録材料はライトワンスのフォトニックポリマで,情報の消去・再書き込み可能というリライタビリティはなかった.また,フォトニックポリマは遮光が不可欠で,記録メディアは常にカートリッジに装着しなければならないことや,経時変化に伴う記録情報の安定性に難点があった.
本研究代表者の林らは,リライタビリティをもつ安定な記録材料として,希土類鉄ガーネットなどの透光性酸化物強磁性体に着目し,この材料のホログラム記録再生特性を調べてきた.強磁性薄膜にホログラムを記録する磁気ホログラフィの研究は,1980 年代にアモルファスTbFe 合金などの垂直磁化膜を用いて調べられたが,10 nm 程度の薄い金属膜からの回折効率は4×10-3 %(松原 他,テレビジョン学会誌, vol.44, 1356(1990))と低く,実用化には至らなかった.
我々は,透光性をもつ希土類鉄ガーネット膜(約3 μm 厚)を用いて,2光束法で単純な縦縞様ホログラムの体積記録を試みた.その結果,フォトポリマの記録時とほぼ同じ60 mJ/cm2 のエネルギー密度で熱磁気書き込みした磁気ホログラムから,回折効率0.14%の高い効率で信号光が再生できることを見出した.この値は,前述の金属膜の場合の30 倍に達する前代未聞の値で,世界で初めて体積的に磁気ホログラフィの記録再生ができることを示した.
この結果を踏まえ,実用性に優れるコリニア方式で磁気ホログラムの形成・再生を試みたところまったく再生光は検出されなかった.これは,コリニア方式では1 つの対物レンズで信号光と参照光とを集光して位相干渉させるために,空間的に相当複雑な体積ホログラムが形成される.フォトポリマでは,その干渉縞を精度よく反映した屈折率変調ホログラムが形成できるが,磁気ホログラムでは磁気ドメインの空間分解能の不足や,熱磁気書込み時の熱拡散による干渉縞のボケが原因と考えられた.
(ウ)これまでの成果を発展させる内容
そこで我々は,多結晶磁性ガーネット膜の結晶粒サイズを平均50 nm程度に低減し,かつ結晶粒間の磁気的結合を弱くすることで,連続的につながる複雑な体積干渉縞を,単磁区磁性ナノドットの集合として表現する方法を試みた.その結果,図4 に示すように,コリニア方式で記録した体積磁気ホログラムから,デジタル信号に対応したピクセルイメージが明瞭に得られ,複雑な干渉縞を形成するコリニア方式でも,体積磁気ホログラムの記録再生ができることを実証した.この成果は国内外を通じて例がなく,新規性・独走性が極めて高い.
本研究は,これらの研究実績を踏まえて,コリニア体積磁気ホログラム記録の高密度化とプロトタイプシステムの構築を行い,究極的にはリライタビリティを有する光磁気体積ホログラムデータストレージの実現を目指すものである.
(2)研究項目
現在以下に記す項目について研究を実施している.
(a) 光磁気体積記録材料の最適化(コントラスト向上とノイズ低減)
多結晶磁性ガーネット膜の結晶粒微細化と粒間磁気結合を制御することで,再生像コントラストに優れノイズの少ない記録材料を得る条件を解明する.
(b) 磁性フォトニック結晶構造を用いた光磁気エンハンストメディアの実現
上述した記録材料に,磁性フォトニック結晶構造などの光磁気エンハンスを施した記録メディアを形成し,記録再生特性に優れるメディア構造を実験的に探査する.
(c) 記録再生光学系の最適化とパルス光源導入による高性能化
熱磁気解析から最適な光学系配置と書込み条件を探る.また,従来のパルスYAG レー ザからフェムト秒に至る短パルスレーザを導入して,記録再生特性の高性能化を図る.
(d) シフト多重による記録密度の向上
磁気体積ホログラムのシフト多重性について定量的に評価し,記録密度の向上を図 る.
(e) 光磁気体積ホログラムストレージのプロトタイプ装置の構築
以上の研究結果を総合的に組み合わせて,コリニア方式による光磁気体積ホログラム ストレージのプロトタイプ装置(非ディスク回転系)を構築する.
(3) 当該分野における本研究の学術的な特色・独創的な点及び予想される結果と意義
(a) 体積的位相干渉パターンを,透光性強磁性体の中に磁性ナノドットの集合として形成 し,磁気ホログラムの記録再生を行おうとする試みは国内外を通じて例はなく,独創性と新規性が極めて高い.
(b) 我々が開発したコリニアホログラフィと光磁気体積ホログラムとを組み合わせること で,世界的に見ても例のないリライタブルなホログラム光ディスクストレージが実現できる.
(c) 本研究で構築するプロトタイプ装置をベースとして,当該技術の国際標準化に向けた 議論が開始できると同時に,我国の光情報ストレージに関する技術力・国際競争力の一層の強化,新成長戦略が目指すグリーンイノベーション,ライフイノベーションに資するものである.
・Study on the structures and functions of the glycans attached to proteins and lipids
・Regulation of the malignant properties of cancer cells by remodeling of glycan structures
・Study on the effects of the chemical compounds and anti-cancer drugs on glycosylation
・Development of the engineered materials with glycan functions