Tohoku University. Research Profiles

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"H" Keywords - 76 Result(s)

H

 h

[high energy photon beams]

Experimental Nuclear Physics

1) Study of strangeness nuclear physics and hypernuclei with high energy electron/photon beams

2)加速器研究施設で収集される大量のデータ解析技術、
  荷電粒子、高エネルギー光子の測定技術、

Department of Physics, Graduate School of Science
NAKAMURA, Satoshi N., Professor Doctor of Science

[high friction material]

Development and Application of Hard Porous Carbon Materials RB Ceramics Made from Rice Bran

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Features
We developed a hard porous carbon material, a RB ceramics, made from defatted rice bran. This is an effective use of the defatted rice bran after rice oil was extracted. The RB ceramics has low friction and high wear resistance without using any lubricants. We also succeeded in the development of resin composites filled with the RB ceramics particles, which exhibit low friction. On the other hand, we developed elastomeric composites filled with the RB ceramics particles as high friction materials.

Targeted Application(s)/Industry
We have conducted researches on development and applications of low-friction or high-friction materials in collaboration with many companies including small- and medium-sized enterprises, such as in industrial, sports engineering, health-care, welfare, and living-ware fields. We have successfully achieved more than 60 practical applications with the collaboration.

Graduate School of Engineering
HOKKIRIGAWA, Kazuo, Professor Doctor of Engineering

[high pressure]

Supercritical Fluid Technology Based on its Unique Properties

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Features
We have investigated various physical properties of supercritical fluids and their mixture. The properties studied are density, viscosity, phase equilibria, solubility, etc. under high temperatures and pressures. Using these suprecritical fluid features, we have proposed their application technologies; such as extraction of natural resources, cleaning, drying, catalyst preparation, polymer processing, polymer recycling, biomass conversion and controlled delivery. The methodologies used are experiments, simulation and theretical ones.

Targeted Application(s)/Industry
Cleaning Technology: precision machinery component, optical component, etc.
Extraction of Natural Resources: food, supplements, aroma.
Polymer Processing: functional resin, electronic component, etc.

Graduate School of Engineering
INOMATA, Hiroshi, Professor Doctor of Engineering

Peptide formation under high P and T conditions: new carbon fibers

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Peptides are formed through the enzymatic actions in living organisms, but difficulty exists to form peptide by non-enzymatic actions. Here we report the success of peptide formation under anhydrous, high P and T conditions. We were successful to form 11-mer of glycine and 5-mer of alanine. They are important constituents of spider silk, which is a candidate of next generation of carbon fibers. Therefore, our techniques have potentials to apply making new carbon fibers without biotechnology.

Geosciences Department, Graduate School of Science
KAKEGAWA Takeshi, Professor Ph.D.

[high quality biodiesel]

A Novel Process for Continuous Production of High Quality Biodiesel with Ion-Exchange Resin Catalysts

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Features
We successfully developed a continuous production process for high-quality biodiesel. This production technology is very simple, just passing through the reactors packed with ion-exchange resins without complicated upstream and downstream processes, which provide additional production cost and environmental stress and the entire process is fully automatic. With this technology, you can easily produce high-quality biodiesel from various cheaper oils with fatty acid content up to 100%.

Targeted Application(s)/Industry
This innovative technology succeeds in solving the serious problems in the current biodiesel production, restriction by shortage of feedstock supply and the unstable quality of biodiesel due to the soap formation. This technology also applies to the production of fatty acid methyl ester, a starting material for surfactant production, which is an important intermediate step in oleochemistry.

Graduate School of Engineering
SHIBASAKI-KITAKAWA, Naomi, Professor Doctor of Engineering

[high sensitivity radio-impurity measurement]

High Sensitivity Radioactivity Measurement at Ultra-Low Radioactivity Environment

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Features
Research Center for Neutrino Science established ultra-low radioactivity environment (trillion times lower than natural environment) with 1200 cubic-meter organic scintillator detector at 1000m underground where very stable temperature/humidity and low vibration are maintained. We are pursuing high sensitivity measurements, especially neutrino observation, and are also developing purification system for ultra-low radioactivity and high performance radioactivity detectors.

Targeted Application(s)/Industry
The established ultra-low radioactivity environment is suitable for rare phenomena study and is also applicable for high sensitivity radio-impurity measurement. It may also apply to investigation of biological influence of low radioactivity irradiation. The other applications such as neutrino detection technique for monitoring nuclear reactors and medical use of high sensitivity radioactivity detectors may also be considered.

Research Center for Neutrino Science
INOUE, Kunio, Professor Doctor of Science

[high strength steel]

Hydrogen embrittlement of high strength steels

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1) Features
We are studying hydrogen embrittlement property of high strength steels from the aspects of both the effect of hydrogen on mechanical properties of high strength steels and hydrogen uptake behavior in corrosive environments. The topics of our study includes clarification of mechanism of hydrogen embrittlement of various steels, investigation of hydrogen entry caused by corrosion using electrochemical techniques, hydrogen visualization, proposing evaluation methods for hydrogen embrittlement property and so forth.

2) Targeted Applications / Industry
Collaborative research in the field of hydrogen embrittlement, for example, hydrogen embrittlement properties of high strength steels and the effects of metallographic structure and hydrogen traps, proposal of evaluation methods for hydrogen embrittlement property for some specific steel and for parts with specific shape, development of novel hydrogen visualization techniques.

Institute for Materials Research
AKIYAMA, Eiji, Professor Doctor of Science

[high-purity materials]

Development of new materials based on the calculation of thermodynamic properties through electronic theory

Features
We are conducting studies on computing the free energies of materials; the structures and physical properties of grain boundaries and stacking faults; and the thermodynamic properties of the liquid and glassy phases by coupling first-principles calculations and cluster variation methods, as well as quantum molecular dynamics.

Targeted Application(s) / Industry
Furthermore, the world’s highest-purity materials are produced through a combination of chemical and physical refining methods to confirm the calculated thermodynamic properties with high accuracy and to develop new materials such as magnetic materials, semiconductors, and lightweight materials based on Mg and Al alloys.

Institute of Multidisciplinary Research for Advanced Materials
OHTANI, Hiroshi, Professor Doctor of Engineering

[high-temperature injury]

Methods to Restore Strelity of Gramineous Plants under High- and Low-Temperature Stress Conditions

Features
Plant reproductive development is more sensitive than vegetative growth to many environmental stresses. High-temperature injury is becoming an increasingly serious problem due to recent global warming. In wheat, barley, and other crops, the early phase of anther development is most susceptible to high temperature. Oppositely, grain yields in rice plants are often reduced by exposure to low temperature. Unexpected climate change, such as abnormally hot or cool summer temperatures, have occurred repeatedly during recent years. This method indicates that an appropriate use of specific phytohormones, such as auxin and GA, may promote stress tolerance and adaptation to abiotic stresses.

Targeted Application(s)/Industry
These potentially novel functions of the classical phytohormones will be important sustainable agriculture in the face of global climate change.

Graduate School of Life Sciences
HIGASHITANI, Atsushi, Professor Doctor of Science

 H

[High Performance Computing]

High Performance Computer Architectures and their Applications

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Features

My research interests include the design and development of high-performance supercomputing systems and their applications. Targeted areas range from the key components of supercomputing systems, which include processor architectures, memory subsystems, network systems, task schedulers, and compilers, to high-performance multimedia processing algorithms such as photo-realistic computer graphics.


Targeted Application(s)/Industry

Currently I am conducting joint-research projects with several companies in the fields of high-performance computer architecture design and advanced simulation technologies for industrial design such as next-generation supercomputers and highly efficient and comfortable regional jets.

Graduate School of Information Sciences
KOBAYASHI, Hiroaki, Professor Doctor of Engineering

Supercomputing for enabling large-scale advanced simulations

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As modern supercomputers are getting larger and more complicated, it is not so easy to exploit their potential performance. It is necessary to develop a simulation code with considering various factors for both hardware and software reasons, and hence expert knowledge and experiences about supercomputing are often needed to achieve high actual performance. Our research interests focus on shaping future supercomputing systems and their applications, especially system software technologies for effectively using the future supercomputers. Also we are always exploring how to make good use of the state-of-the-art hardware and software technologies in order to enable unprecedented-scale and more advanced simulations.

From beginning (apply for use of our supercomputer) to end (get a solution), we can consistently support developing large-scale practical simulation, which is feasible only by using the supercomputer. As a supercomputing center, we have a long history of parallelizing and accelerating a lot of practical simulation programs. In addition, we are looking for research collaborators who are interested in streamlining and/or facilitating large-scale scientific software development.

Cyberscience Center
TAKIZAWA, Hiroyuki, Professor Doctor of Information Science

[High reflective index]

Polymer-nanoparticle hybrid materials

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Features
Hybrid materials that show multi-functions of polymer and nanoparticles are expected to be used in future industries, and thus many research and development have been actively conducted. However, since the affinity of polymer and inorganic nanoparticles is very low, in most of the cases, properties of different materials are incompatible in the hybrid materials. To create the hybrid materials with incompatible multi-functions has been considered a difficult task.
However, by using supercritical fluid technology, we have succeeded in making hybrid materials with incompatible multi-functions.

Targeted Application(s) / Industry
Now, variety of hybrid materials are being developed, including
・Transparent, flexible, high reflective index, and high fabricability,
・Flexible, high heat conductivity, low electric resistivity, and high fabricability.

Advanced Institute for Materials Research
ADSCHIRI, Tadafumi, Professor Doctor of Engineering

[High temperature]

Development of the method of Baby Borehole Hydraulic Fracturing, BABHY

For the effective measurement of the reopening pressure in hydraulic fracturing, it is necessary to use the testing equipment with sufficiently small compliance. This limitation makes it difficult to apply the hydraulic fracturing for the measurement of the maximum stress, because the compliance of conventional equipments is generally so large. Taking account of this situation, we proposed a new concept which allows us to do the in-situ tests of hydraulic fracturing for stress measurement at so deep depths as more than 1 km. We call the concept the Baby Borehole Hydrofracturing, BABHY for short. In order to put the new concept into practice, we developed the BABHY sonde and finally we succeeded to carry out hydraulic fracturing test by using the tools in a vertical borehole of 811 m depth. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry.

Large-Scale Environmental Fluid Dynamics Laboratory, Complex Flow Division, Institute of Fluid Science
ITO, Takatoshi, Professor Doctor of Engineering

[High temperature physical chemistry]

Eco-Material Processing

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Features
The major subject of our group is ferrous process metallurgy including thermodynamics of metals, alloys and molten slags, high temperature heterogeneous kinetics, phase equilibria of complex oxide systems and so on. We are interested in physic-chemical fundamentals of processing of metals, slags, scrap and waste. Recently our research interests are extended to multidisciplinary area so-called "Industrial Ecology" by the combination of process metallurgy, LCA (life cycle assessment) and social science such as econometrics.

Targeted Application(s)/Industry
Typically our research group is aggressively working in the area of material flow analysis of critical metals considering the quality of recycled materials. Currently our major research partners are steel and non-ferrous industries, while we do hope to collaborate with waste treatment company, mineral industry and an administrative organ.

Department of Metallurgy, Graduate School of Engineering
NAGASAKA, Tetsuya, Professor Doctor of Engieering

[High-Dimensional Dynamics]

Brainmorphic Computing Hardware

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We will develop a brainmorphic computing hardware, which realizes the brain-specific functions such as conscious/sub-conscious process, self, selective attention, and so on, by directly using inherent physics and dynamics of constituent devices. The resulting hardware would be small, efficient, high-performance. Some examples include the chaotic neural network reservoir, optimization through high-dimensional complex dynamics, and neural network composed of spin-orbit torque nano-devices.
The resulting hardware is suitable for the edge AI which learns users’ personal behavior. Examples include watching service devices embedded in hearing aids or dental implants, which monitor and learn personal cardiac and brain-wave signals or saliva ingredients, to detect abnormal situations.

Research Institute of Electrical Communication
HORIO, Yoshihiko, Professor Ph.D

[High-impact polystyrene]

Chemical Recycling of Problematic Polymeric Wastes

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Features
The Yoshioka Laboratory works on the recycling of various polymers by thermal and wet processes. Plastics such as poly(ethylene terephthalate) (PET), polyvinyl chloride (PVC), and high impact polystyrene (HIPS) cause serious problems during their recycling for the recycling process and the environment. However, these materials can also be seen as a resource for new materials. The decarboxylation of PET results in high yields of benzene that can be used as a chemical feedstock. Another important feature is the dehalogenation of flame retarded plastics and PVC. Dechlorinated plastic waste can be an important source for hydrocarbons, which can be used as fuels and chemical feedstock. The chemical modification of PVC offers the possibility of new materials with new properties. Modified PVC can be used as antibacterial material or as a material with ion exchange properties. The removal of brominated flame retardants from HIPS leads to higher recovery rates of styrene during thermal processing. When a wet process is used, the resulting flame retardant free HIPS can be reused.

Targeted Application(s)/Industry
We are eager to help companies to overcome their problems during recycling and recovery, and provide solutions for the treatment of waste materials.

Graduate School of Environmental Studies
YOSHIOKA, Toshiaki, Professor Graduate School of Engineering

[High-pressure combustion]

Combustion and Atomization Technology in High-Pressure Gas Turbine Conditions

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Features
Combustion is a complex phenomenon composed of multi-dimensional dynamics of temperature, concentration, velocity, and chemical reactions. Advanced combustion technologies are essential for solving the environmental and energy issues. Our laboratory has a high-pressure combustion test facility which is a unique experimental facility in the world. Research projects have originality, especially in the field of high-pressure combustion and laser diagnostics, and focus on not only aerospace engineering and energy engineering including new fuel technology but also atomization technology and safety operations of chemical plants mostly operated at high pressure.

Targeted Application(s)/Industry
Potential collaborations are in the research fields of aerospace propulsions, automobile engines, power generations and chemical plants, in terms of development of gas turbine combustors for various fuels, generation and control of fuel atomizers, laser diagnostics of combustion and safety design of chemical reactors.

High Speed Reacting Flow Laboratory, Institute of Fluid Science
KOBAYASHI, Hideaki, Professor Doctor of Engineering

[High-speed combustion]

Combustion and Atomization Technology in High-Pressure Gas Turbine Conditions

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Features
Combustion is a complex phenomenon composed of multi-dimensional dynamics of temperature, concentration, velocity, and chemical reactions. Advanced combustion technologies are essential for solving the environmental and energy issues. Our laboratory has a high-pressure combustion test facility which is a unique experimental facility in the world. Research projects have originality, especially in the field of high-pressure combustion and laser diagnostics, and focus on not only aerospace engineering and energy engineering including new fuel technology but also atomization technology and safety operations of chemical plants mostly operated at high pressure.

Targeted Application(s)/Industry
Potential collaborations are in the research fields of aerospace propulsions, automobile engines, power generations and chemical plants, in terms of development of gas turbine combustors for various fuels, generation and control of fuel atomizers, laser diagnostics of combustion and safety design of chemical reactors.

High Speed Reacting Flow Laboratory, Institute of Fluid Science
KOBAYASHI, Hideaki, Professor Doctor of Engineering

[High-Speed Projector]

High-Speed Vision for Real-Time Motion Analysis

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Features
We are investigating high-speed vision systems that enable real-time image acquisition and visual processing at frame rates substantially higher than the standard video rate.

Targeted Application(s)/Industry
High-speed vision systems are useful for fast measurement and control of dynamic systems in general. When combined with external facilities such as high-speed projectors or acceleration sensors, they enable further wider applications including fast 3D measurement or object identification.

Graduate School of Information Sciences
KAGAMI, Shingo, Associate Professor Ph.D. (Eng.)

[High-Speed Vision]

High-Speed Vision for Real-Time Motion Analysis

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Features
We are investigating high-speed vision systems that enable real-time image acquisition and visual processing at frame rates substantially higher than the standard video rate.

Targeted Application(s)/Industry
High-speed vision systems are useful for fast measurement and control of dynamic systems in general. When combined with external facilities such as high-speed projectors or acceleration sensors, they enable further wider applications including fast 3D measurement or object identification.

Graduate School of Information Sciences
KAGAMI, Shingo, Associate Professor Ph.D. (Eng.)