"H" Researcher - 20 Result(s)
H
Minimally Invasive Medical Devices and Healthcare Devices Using Micro/Nano Machining TechnologyFeaturesMedical devices and healthcare devices which have several functions with small size have been developed using precise micromachining technology and MEMS (Microelectromechanical systems) technology. More precise and safe diagnostics and therapy, as well as novel diagnostics and treatment can be realized by developing high-functionalized endoscopes and catheters and developing novel medical devices. Healthcare without restriction of location and time is aimed by developing thin, light and high-functionalized new healthcare devices. Targeted Application(s)/IndustryBesides of basic research, we are working in cooperation with clinicians and medical device companies for practical use. We founded a university-launched venture company for bridge-building between university and company and collaborative researches have been performed. Graduate School of Biomedical Engineering
HAGA Yoichi, Professor
Doctor of Medicine, Doctor of Engineering
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Design and Fabrication of Micro-Optical Devices Based on Optics, Especially Optical MEMS and SensorsFeaturesOn the basis of optical engineering, optical technologies for sensing mechanical motion, spectroscopic properties, and other physical/chemical characteristics are investigated. Moreover, using semiconductor micro/nano-fabrication technology, integrated micro-optical sensors, micro/nano optical systems, optical micro-electro-mechanical systems (MEMS) are studied. Micro laser scanner for display, deformable mirror for telescope, optical displacement encoder, and fluorescent analysis system are the examples of research topics. Targeted Application(s)/IndustryOptical design, Optical industries, Industries relating to semiconductor micro fabrication and MEMS, optical telecommunications, etc. |
High-speed and low-power asynchronous Network-on-Chip system based multiple-valued current-mode logicFeaturesGlobal intra-chip interconnection complexity not only limits the clock frequency, but causes clock-skew problems in synchronous system. Asynchronous control-based circuit design, where timing is managed locally, is one of the possible approaches to solve the above serious interconnection problem because the asynchronous design has many features which are low power dissipation, high speed and robustness. However, communication-steps overhead caused by handshaking much would generally affect the cycle time. Targeted Application(s)/IndustryResearch Institute of Electrical Communication
HANYU Takahiro, Professor
PhD of Engineering
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PVT-Variation-Aware VLSI System Based on Nonvolatile-Device/MOS-Hybrid CircuitryFeaturesNonvolatile devices, which can remain stored data without power supply, are generally used for ROM (Read-Only Memory) to store boot programs (the information to start up the computer and the basic instructions that operate it) in computers. One attractive feature is that it does not consume any static power while it remains stored data. ‘Nonvolatile logic' is a novel logic style that a nonvolatile device is used for not only a nonvolatile storage element such as ROM but also a logic-circuit element which is the basic component of a CPU and an entire system. By using the nonvolatile devices as storage elements of circuit-configuration information, we can realize a process-variation- aware logic circuit with small hardware overhead. Targeted Application(s)/IndustryThe proposed technique is effective for implementing high-performance and highly-reliable LSI fabricated with cutting-edge process technology. We expect we can conduct effective collaborative research in highly reliable VLSI-systems fields. Research Institute of Electrical Communication
HANYU Takahiro, Professor
PhD of Engineering
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Development of High Performance Carbon Nanotube-Alumina CompositeFeaturesOne of the important challenges in the development of carbon nanotubes (CNTs) reinforced ceramic composites is uniform dispersion of CNTs in the matrix. The mechanical properties of CNT/ceramics composites have been limited to date due to the formation of CNT agglomerates in the composite. We have successfully produced CNT/alumina composites with world top class strength and toughness, by employing a newly developed CNTs dispersion technique based on a flocculation method. The processing method developed in this study enables us to prepare high performance CNT materials using a pressureless sintering method. Targeted Application(s)/IndustryThe possible applications of the CNT/alumina composites developed in this study include tribological materials (ball bearing), biomaterials (artificial hip joint), micro-actuator materials utilizing electrostrictive effects, electromagnetic wave absorber, particularly in the frequency range of several GHz and several ten GHz. |
Advanced Vision System with Less CalibrationFeaturesThe difficulties of introducing robot systems in production line are maintenance of environment and teaching of robot motion. Environ recognition and motion teaching using vision system will greatly improve the difficulties. However, calibration of vision-robot system is tedious and troublesome. Feedback control using vision sensor information will allow robustness against environment and teach by showing. This technique is called visual servo. Targeted Application(s)/IndustryVisual servo will allow flexible camera setting, calibration-less system setting, and easy teaching. Graduate School of Information Sciences
HASHIMOTO Koichi, Professor
Doctor of Engineering
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A Microwave-Based Non-Destructive Testing Method for the Long Range Inspection of Metallic PipeFeaturesWe are developing a non-destructive testing method for the long range rapid inspection of metallic pipe using microwaves. The method propagates a microwave inside a pipe, and evaluates flaws appearing at the inner surface of the pipe on the basis of the reflection and transmission of the microwave. The method does not require scanning probes unlike conventional non-destructive methods, which enables one to inspect a pipe quite quickly. Our experimental validations have demonstrated the effectiveness of the method using a pipe as long as 30 m. Targeted Application(s)/IndustryThe NDT method proposed here is applicable when many pipes are inspected or conventional methods are not available due to pipe length and its configuration. Department of Quantum Science and Energy Engineering , Graduate School of Engineering
HASHIZUME Hidetoshi, Professor
Doctor of Engineering
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High-Precision Capturing of 3-D Dental-Arch Shapes and Their Occlusal Relation and its Potential Implementation into CAD/CAM DentistryFeaturesIn spite of the long history of digital dentistry, the accuracy of the prosthetics fabricated with CAD/CAM systems is far from satisfactory. Jaw opening during taking impression elicits deformation of the mandible and the lower dental arch, and consequently causes the inaccuracy of occlusal relationship of the upper and lower dental arches on the CAD data. The method presented here utilizes the check-bite record at the maximum intercuspation to correct the relative positions among the teeth in the dental arches as well as between the arches. After this correction, the accuracy of the CAD data is satisfactory enough for the fabrication of the dental prosthetics which need no adjustment during their setting. Targeted Application(s)/IndustryThis method uses the newly-developed check-bite recording technique together with the conventional precious impression or optical impression techniques. It can easily be applied to the commercial CAD/CAM systems in the market. We hope to collaborate to the manufacturers of dental CAD/CAM systems to increase the accuracy of the systems. |
Measurement-Integrated Simulation to Analyze Complex FlowsFeaturesIn order to obtain huge fluid information of real flows we are developing a new flow analysis methodology "measurement-integrated simulation" by integrating experimental measurement and computer simulation. Complex real flows are accurately reproduced by the effect of a feedback signal to compensate the difference between the measurement and calculation. This can be appliedto wide variety of complex flow problems, for example, real-time visualization of blood flows for medical diagnosis, flow analysis around automobile body, real-time monitoring of flow in a complex piping in a nuclear power plant. |
Development of New Reactions Using OrganocatalystFeaturesOrganocatalyst is a synthetically useful catalyst in synthetic organic chemistry, because of the several merits. We have been investigating the development of new and efficient organocatalysts derived from proline. We have already reported the diphenylprolinol silyl ether, which is called as a Jorgensen-Hayashi catalyst, and siloxyproline, which is effective in the presence of water. We have also developed several practical asymmetric catalytic reactions based on the organocatalysts. We also applied these reactions to the total synthesis of natural products and drugs. We have already synthesized Tamiflu in one-pot reaction, and prostaglandin E1 methyl ester via three one-pot procedure. Targeted Application(s)/IndustryOur newly developed reactions using organocatalysis can be widely used for synthesis of medicines, agrichemicals, and chemical products. Department of Chemistry, Graduate School of Science
HAYASHI Yujiro, Professor
Doctor of Science
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Development of rocking isolation bearing system (RIBS) and fundamental study of application to bridgesFeaturesAs an idea motivated by the damage mode of the conventional pin bearing that actually occurred, we propose "a new seismic isolation bearing system". In order to clarify the reasonable implementation methodology and structural details that can drastically improve the seismic performance of bridge structures, a fundamental study will be conducted on the dynamic characteristics of bridges featuring such a RIBS by using an idealized mathematical model. Targeted Application(s)/IndustryWe aim to develop a new type of seismic isolation bearing used in bridge structures. For example, the bearing can be used to replace a damaged bearing after a strong earthquake or to build a new bridge. School of Engineering, Department of Civil and Environmental Engineering
HE Xinhao, Assistant Professor
Ph.D (Eng.)
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Methods to Restore Strelity of Gramineous Plants under High- and Low-Temperature Stress ConditionsFeaturesPlant 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)/IndustryThese potentially novel functions of the classical phytohormones will be important sustainable agriculture in the face of global climate change. |
Regulation of TSLP Production in KeratinocytesFeaturesThymic stromal lymphopoietin(TSLP)has been focused as a master switch for allergy. We established a mouse keratinocyte cell line which constitutively and highly produces TSLP. This cell line will be useful to find the inhibitor of TSLP production and to study biochemical features of production and action of TSLP. The inhibitor of TSLP production might be used as an external or an inhalation drug, indicating low probability of causing a decrease in immune competence. Targeted Application(s)/IndustryBy using this cell line, we expect we can conduct effective collaborative research in medical fields. For examples, the cell line is useful for analysis of TSLP production and functions, development of inhibitors of TSLP production, and detection of immunotoxic compounds. |
Transport Control of Semiconductor Quantum Structures and Highly Sensitive NMRFeaturesHighly-sensitive NMR technique has been developed by manipulation polarization of nuclear spins via control of transport characteristics in GaAs and InSb quantum structures. This highly-sensitive NMR can be applied to two-dimensional and nanostructures. Furthermore, ideal gate controllability has been demonstrated in InSb quantum structures with Al2 O3 dielectrics. More importantly, the concept of generalized coherence time was introduced, where noise characteristics felt by nuclear spins can be measured including their frequency dependence. This concept will bring about a change in all nuclear-spin related measurements. Targeted Application(s)/IndustryNext generation InSb devices based on good gate controllability. Various nuclear-spin based measurements and NMR utilizing the concept of generalized coherence time. Highly-sensitive NMR is now important for fundamental physics studies. In the future, it will contribute to quantum information processing. |
Development of Compound Semiconductor Radiation DetectorsFeaturesThe main research subject of our group is developing material purification methods, crystal growth methods and detector fabrication technologies for compound semiconductor radiation detectors. Our group intensely studies a compound semiconductor, thallium bromide (TlBr), for fabrication of gamma-ray detectors for the advanced radiation applications. The attractive physical properties of TlBr lie in its high atomic number (Tl: 81, Br: 35), high density (7.56 g/cm3) and wide bandgap (2.68 eV). Due to the high atomic number and high density, TlBr exhibits high photon stopping power. The wide bandgap of TlBr permits the device low-noise operation at and above room temperatures. Targeted Application(s)/IndustryOur group focuses on development of compound semiconductor radiation detectors for advanced radiation applications including ultra-high resolution PET systems, ultra-high resolution SPECT systems, photon counting CT systems and Compton cameras. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry. Department of Quantum Science and Energy Engineering, Graduate School of Engineering
HITOMI Keitaro, Associate Professor
Doctor of Engineering
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Cyber Physical Systems Security and Its ApplicationsFeaturesOur study focuses on information security technologies for the next-generation ICT society fusing real-world and cyber-space computing. We are now conducting the research and development of ultra-high-speed, ultra-low power LSI computing to perform security functions such as encryption and secure computing, secure implementation technologies to protect systems from various physical attacks (attacks carried out by physical access to the system), and security optimization technologies tailored to the system usage environment and application area. Targeted Application(s)/IndustryWe can provide collaboration and information exchange services in the fields of information security. In particular, we have experiences of domestic/international collaborative researches on embedded security with some companies, universities, and governmental institutes. Research Institute of Electrical Communication
HOMMA Naofumi, Professor
Ph.D Info. Sci.
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Advanced Nanotechnology for Critical metal free secondary batteryFeaturesMonoatomic 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)/IndustryAcademia – 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
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Lethal effects of blue light on insectsFeaturesWe revealed the strong lethal effect of short-wavelength visible light (blue light: 400–500 nm) on insects. That is, we found that blue light irradiation by using a common light-emitting diode (LED) can kill the eggs, larvae, pupae, and adults of various orders of insects. Our findings will provide clean and safe pest-control technique as well as important information on the hazards of exposure to visible light. Targeted Application(s)/IndustryGraduate School of Agricultural Science
HORI Masatoshi, Professor
Doctor of Philosophy
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Brainmorphic Computing HardwareFeaturesWe 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. Targeted Application(s)/IndustryEdge AI devices, especially for peri-personal space), Time-series processing (prediction, recognition, and categorization), Online real-time learning. |
ICT Use by Teachers and Students in the Classrooms of Elementary and Secondary SchoolsFeaturesMy research focuses on ICT use in the classrooms of elementary and secondary schools in Japan. Targeted Application(s)/IndustryMy research can be applied to a development of teaching support tools for elementary and secondary school teachers which can be used in the classroom and a consulting service to assist development of digital teaching materials for school students. |
