Tohoku University. Research Profiles

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"S" Keywords - 160 Result(s)

S

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[stress]

The Novel Ultrasound Irradiation Device

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Dr. Katsunori Nonogaki has developed the novel ultrasound irradiation device, which can improve the autonomic nervous system activity and peripheral circulation. In addition, the ultrasoud device can improve hypertension and hyperglycemia within 20 min in subjects with drug-resistant hypertension and diabetes. Our initial device was approved in Japan (226AIBZX00028000). This device will be avaliable for the treatment of 1) muscle pain, 2) the autonomic neural dysfunction and stress-related disorders, 3) hypertention, and 4) diabetes. Moreover, the device will be usefull for your healthy life and aging care.

Targeted Application(s)/Industry

Our aims are to export the device internationally. We seek the investment and international business partners.

Department of Diabetes Technology, Graduate School of Biomedical Engineering
NONOGAKI Katsunori, Professor MD, PhD

[stress assessment]

Project “The Mirror Magical”: Remote and Non-Contact Extraction of Biological Information

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We engage in development of a cyber-medical system, “The Mirror Magical” for taking a medical check-up anytime and anywhere by use of information and communication technology (ICT). We only have to stand still in front of the mirror to check our autonomic nervous function related to baroreflex on the basis of video signals capable of remote and non-contact measurement. Demonstration experiments have been held to verify the validity of the system in estimation of blood pressure variability and the effects of physical exercise.

Targeted Application(s)/Industry

We can conduct effective collaborative research using the system not only in medical and welfare fields but also for application to smartphones, automobiles, emotion recognition robots, security cameras, sports broadcast and so on.

Center for Promotion of Innovation Strategy
YOSHIZAWA Makoto, Dr Eng

[Stress Corrosion Crack]

Fabrication of Imitative Stress Corrosion Cracking Specimens for the Development of Nondestructive Evaluation Techniques

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The emergence of stress corrosion cracking is one of the most important issues from the viewpoint of aging management and maintenance of nuclear power plants. There is a large discrepancy between stress corrosion cracking and other cracks such as fatigue cracks from the viewpoint of nondestructive testing and evaluations, which requires suitable specimens containing stress corrosion cracking for the development of nondestructive testing and evaluation techniques and also for personnel training. However, artificially introducing stress corrosion cracking needs large cost and long time. Furthermore, several studies have pointed out that such articial stress corrosion cracking is not always similar to natural ones. On the basis of the background above, we develop a method to fabricate "imitative" stress corrosion cracking specimens using diffusion bonding.

Targeted Application(s)/Industry

The method enables one to introduce a region whose response is almost identical to actual stress corrosion cracking from the viewpoint of nondestructive testing. Whereas the dimension of the region is accurately controllable, the method requires much less cost and time comparing the conventional ones using corrosive environment. Patent is already applied for.

Department of Quantum Science and Energy Engineering , Graduate School of Engineering
YUSA Noritaka, Professor Doctor of Engineering

[stress corrosion cracking]

Suppression of Intergranular Degradation of Polycrystalline Materials by Grain Boundary Engineering

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Intergranular degradation often results in decreased lifetime, reliability and economical efficiency of polycrystalline materials. In spite of persistent efforts to prevent such degradation, its complete suppression has not yet been achieved. Grain boundary studies have revealed that coincidence-site-lattice (CSL) boundaries have stronger resistance to intergranular degradations than random boundaries. The concept of ‘grain boundary design and control' has been refined as grain boundary engineering (GBE). GBEed materials which are characterized by high frequencies of CSL boundaries are resistant to intergranular degradations. Our group has achieved very high frequencies of CSL boundaries in commercial stainless steels by GBE. GBEed stainless steels showed significantly stronger resistance to intergranular corrosion (see Figs. 1 and 2), weld-decay, knife-line attack, stress corrosion cracking, liquid-metal embrittlement, radiation damage, etc. and much longer creep life (see Fig. 3) than the unGBEed ones.

Targeted Application(s)/Industry

By using this GBE processing, we expect to conduct effective collaborative research in related fields.

Department of Materials Processing, Graduate School of Engineering
SATO Yutaka, Professor Ph.D.

[stroke]

Mechanism of Restoration and Rehabilitative Treatment of Movement Disorders

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Our investigation aims to develop rehabilitative treatment for movement disorders due to brain damage using non-invasive brain stimulation (NIBS) such as transcranial magnetic stimulation (TMS), and transcranial direct current stimulation (tDCS). TMS, eddy current stimulation, and tDCS (1-5 mA, 10 minutes) both can modulate excitability of the cerebral cortex, and are applicable for restoration of limb paresis. We focus on modulating body scheme to induce appropriate adaptive changes of the central nervous system using NIBS.

Targeted Application(s)/Industry

Our goal is to develop therapeutic systems for movement disorders in which NIBS devices are combined with robotics or sensors. We would like to collaborate with companies for developing, manufacturing, and selling innovative medical devices.

Department of Physical Medicine and Rehabilitation, Graduate School of Biomedical Engineering
IZUMI Shin-ichi, Professor PhD

[Suatainability]

Integrated Design for Sustainable Energy Systems

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The concept of LCS (low carbon society) is a unique approach having multi-dimensional considerations such as social, economic and environmental dimensions. The LCS aims at an extensive restructuring of worldwide energy supply/demand network system by not only replacing the conventional parts with the new ones, but also integrating all the necessary components and designing absolutely different energy networks. An energy-economic model is a tool for decision making for a variety of purposes, such as energy security planning, climate policy analysis, and technology innovation assessment.

Targeted Application(s)/Industry

Provide local governments, participating companies, and consultants with databases related to local energy supply and demand to support data analysis and scenario design in planning smart cities and decarbonized regions.

Department of Management Science and Technology , Graduate School of Engineering
NAKATA Toshihiko, Professor Doctor of Engineering

[super vitaminE]

Selective recovery of tocotrienol from vegetable oils using ion-exchange resins

Features

Tocotrienol, one of vitamin E, has recovered by the conventional method with molecular distillation from deodrizer distillate discharged from the oil refining processes. However, tocotrienol easily loses its activity due to its low thermal stability, so that its recovery ratio and purity were extremely low. We proposed a novel method to selectively recover tocotrienol by adsorption/desorption using anion-exchange resin at 50 degree C. Tocotrienol is retained on the resin by ion-exchange reaction, and then released and recoverd from the resin by other ion-exchange reaction. Prior to the adsorption/desorption, free fatty acid, a major component of the feed, should be removed by esterification using cation-exchange resin at 50 degree C.

Targeted Application(s)/Industry

This innovative technology succeeds in solving the serious problems in the current tocotrienol production, the large weight loss due to the thermal decomposition and large amount of remaining impurities. This technology applies to the production of not only tocotrienol but also tocopherol as bioactive compounds s in food chemicals.

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

[Superalloy]

Precipitation Hardened Co-based Alloy

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The high-temperature strength in Co-based alloys is inferior to that in Ni-based superalloys due to no available ’ phase for strengthening Co-based alloys. We have found a new intermetallic compound Co3(Al,W) ’ phase, and /’ Co-Al-W-based wrought and cast alloys show excellent high-temperature strength. The /’ Ir-Al-W-based alloys are also available for high-temperature uses at over 1100 °C. The Co-based alloys also have good wear resistance. For example, friction stir welding (FSW) of high-softening-temperature materials such as steels and titanium alloys is possible using a Co-based alloy tool. We hope to conduct collaborative research with willing company for a practical application of the Co- or Ir-based alloys for high-temperature uses including FSW applications.

Department of Metallurgy, Graduate School of Engineering
OMORI Toshihiro, Associate Professor Ph.D.

[Supercapacitor]

Advanced Nanotechnology for Critical metal free secondary battery

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Monoatomic layered materials of Graphene, Transition metal sulfide nanosheet, nanocrystalline active materials, nanoparticles and nanoporous materials are investigated for realizing high capacity, high power, high safety and low cost energy storage devices as a post- Lithium ion battery. Advanced chemistry of functional materials and device processes for All solid state battery, Magnesium battery, fuel cells, supercapacitor and wearable batteries are investigated.

Targeted Application(s)/Industry

Academia – Industry collaboration with manufacturing companies of functional materials, batteries, and also smart grid, renewable energy, electrical power companies are encouraged for developments of advanced energy materials and post-Lithium ion battery.

Institute of Multidisciplinary Research for Advanced Materials
HONMA Itaru, Professor Doctor of Engineering

[Supercomputer]

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.

Targeted Application(s)/Industry

Cyberscience Center
TAKIZAWA Hiroyuki, Professor Doctor of Information Science

[Supercomputer applications]

High Performance Computer Architectures and their Applications

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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

[Supercomputers]

High Performance Computer Architectures and their Applications

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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

[superconductivity]

Emergence in collective electrons in organic molecular materials

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The main research subjects in this group are the experimental investigations of the organic molecular conductors. The characteristic properties of the organic materials are multiple flexibilities owing to the assemble structure of nanometer-size molecules. This flexbility comes up recently for developing the organic electronic devices. We explore the fundamental electronic properties of the organic molecular materials which have wide range of the ground states from superconductivity to insulating states resulting from the strongly correlated electrons in the molecular pi-orbital. Such features are closely connected to flexible and multiple degrees of freedom in charge, spin, molecular latticeand molecules themselves. We are actively studying on the interesting and important issues in the condensed matter physics from the viewpoints of the characteristic flexbility of the organic molecular materials. We are prepared to provide academic consultations to companies interested in our research.

Low Temperature Condensed State Physics, Institute for Materials Research
SASAKI Takahiko, Professor Dr. Eng.

Neutron scattering study on macroscopic quantum phenomena

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In contrast to other scattering techniques, such as x-ray and electron diffractions, neutron scattering has the following advantages: 1) light atoms, such as H and Li, can be detected; 2) electron spins can be detected; 3) low energy excitations can be investigated. Using the neutron scattering technique, we search for macroscopic quantum phenomena in many-body electron systems, such as macroscopic singlet ground states in the quantum frustrated magnets and spin-fluctuation-mediated unconventional superconductors.

Targeted Application(s)/Industry

As noted above, neutron scattering can be used for investigating magnetic structure, spin dynamics, light atom positions in crystalline materials and their dynamics. Hence, this technique is very useful when those pieces of information are to be known.

Institute of Multidisciplinary Research for Advanced Materials
SATO Taku J, Professor Doctor of Science

Oxide Electronics

Features

Our research group investigates creation of functional oxides and their functionalities. We synthesize thin films by pulsed laser deposition and sputtering methods and bulk specimens, and develop their novel synthetic routes. Recently, we are studying electrically conducting rare earth oxides, transparent room temperature ferromagnetic semiconductors, and layered superconductors with monatomic Bi layer. We will develop our materials design by extending materials range and performing oxide heteroepitaxy.

Targeted Application(s)/Industry

Collaborative research in fields of oxide electronics with novel electric conducting oxides and oxide spintronics with ferromagnetic semiconductors and novel ferromagnetic oxides.

Advanced Institute for Materials Research
FUKUMURA Tomoteru, Professor Doctor of Engineering

[Supercritical]

Development of a reaction process in supercritical water

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We are developing a new continuous flow type process for supercritical reactions. Under the supercritical state, the organic molecules and metal salt aqueous solutions are miscible and water molecule works as an acid/base catalyst which leads to rapid reactions. In order to apply such new reaction fields to an industrial process, it is necessary to establish the process design basis by understanding phenomena in the reaction fields, on the basis of phase equilibrium, flux and reaction kinetics theory. So while developing a process, we are doing research for the establishment of the process design basis.

Targeted Application(s)/Industry

Examples are a process for the synthesis of organic modified nanoparticles (MPs), a process for the pretreatment and solubilization of biomass in the supercritical/subcritical water and a process for the refinery of heavy oil in the supercritical water.

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

Low temperature reforming of hydrocarbons using metal oxide nanoparticles synthesized by supercritical method

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Our research group has succeeded in synthesizing various metal oxide nanoparticles with controlled size and exposure crystal planes by using organic modifiers under supercritical water conditions. The oxygen storage/release capacity of those materials in the low-temperature region is very high, and the reforming reaction of oxidative hydrocarbon proceeds at a significant rate. Besides, by combining the supercritical CO2 drying method, we have succeeded in forming a complex in which oxide nanoparticles are dispersed at a high concentration on the surface of the porous material, realizing both high oxygen storage/release capability and stability.

Targeted Application(s)/Industry

Low-temperature reforming reaction of biomass wastes, heavy oils, and methane. In the future, it is expected to be a technology that will lead to the construction of a low-carbon society, including CO2-free complete recycling of waste plastics.

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

[supercritical fluid]

Supercritical Fluid Technology Based on its Unique Properties

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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

newProcess development using chemical reactions in high temperature/high pressure water; Super/subcritical fluid extraction technology

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Most of my research to date have been related to hydrothermal technology (e.g., super/subcritical water technologies), supercritical fluid (CO₂) and subcritical fluid (DME) extraction technologies, inorganic materials synthesis, coal chemistry, biomass conversion, microalgae extraction, and waste recycling. And I have a lot of experimence on the practial application of chemical engineering. The current research themes include spent lithium-ion battery recycling, waste plastic recycling, and automation and intelligence of chemical experiments.

Targeted Application(s)/Industry

Spent lithium-ion battery recycling and waste plastic recycling

Research Center of Supercritical Fluid Technology, Graduate School of Engineering, Tohoku University
ZHENG Qingxin, Assistant Professor PhD

[Supercritical reaction]

Supercritical Hydrothermal Synthesis of Organic-Inorganic Hybrid Nanoparticles

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We invented supercritical hydrothermal synthesis method for the synthesis of organic modified nanoparticles (NPs). Under the supercritical state, the organic molecules and metal salt aqueous solutions are miscible and water molecule works as an acid/base catalyst for the reactions. Organic-inorganic conjugate NPs can be synthesized under this condition. This hybrid NPs show high affinity with the organic solvent or the polymer matrix, which leads to fabricate the organic inorganic hybrid nanomaterials with the trade-off function (super hybird nanomaterials). These hybrid materials of polymer and ceramics fabricated with NPs achieve both high thermal conductivity and easy thin film flexible fabrication, namely trade-off function.

Targeted Application(s)/Industry

For example, by the surface modification of BN particles by supercritical method, affinity of BN and polymers could be improved, so that high BN content of hybrid materials, thus high thermal conductivity materials, could be synthesized. Also by dispersing high refractive index NPs like TiO2 or ZrO2 into polymers transparently, we can tune the refractive index of the polymers. CeO2 nanoparticles are expected to be used for high performance catalysts. To transfer those supercritical fluid nano technologies, a consortium was launched with more than 70 companies.

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