Tohoku University. Research Profiles

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"H" Theme - 16 Result(s)

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Hands-On Access Fabrication Facility –Open Facility for MEMS and Semiconductor Prototyping–

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We offer a hands-on-access fabrication facility for MEMS and semiconductor research and development. The facility is located at the 1800m2 clean room, Jun-ichi Nishizawa Memorial Research Center, Tohoku University, and started in 2010. The principle is an open access that users can utilize the fab and operate the equipment by themselves. Users also can access a great deal of know-how accumulated at Tohoku University. More than 260 companies have utilized the fab for developing various devices. To accelerate University's R&D and education, product fabrication by a company user is started in July 2013.

Targeted Application(s)/Industry

Our target is MEMS and semiconductor devices including sensors (accelerometer, gyroscope, pressure sensor, force sensor, photo diode, radiation sensor, microphone, bio sensor), solar cell, RF device, optical device, micro actuator. Process technology, such as etching, sputtering, oxidation/diffusion, CVD and bonding is also available.

Micro System Integration Center
TOTSU, Kentaro, Associate Professor Doctor of Engineering

Hardware Development of Brain Computer and its Application to Visual Information Processing

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Toward realizing a high-performance neuromorphic vision processing system, our research involves a neural network model of spatial perception based on motion-stereo vision and its implementation on a very large scale integrated circuit (VLSI). Important parameters for spatial perception such as time-to-contact, orientation, and the shortest distance to plane surfaces of a target object are recognized by using the model without knowing moving direction and velocity of the object. We have developed a VLSI capable of performing visual perception based on the model with low power consumption, reduced less than 1/100 compared with a commercial CPU.

Targeted Application(s)/Industry

Targeted applications include a drone flying autonomously equipped with collision avoidance system by visual perception. Targeted industry includes infrastructure inspection, agriculture, logistics, and so on.

Research Institute of Electrical Communication
SATO, Shigeo, Professor Ph.D (Information Science)

Hierarchy Control in Structure and Creation of Novel Properties in Nano Scale Materials

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Crystals produced from the building blocks using a concept of geometrical materials, from the ubiquitous elements such as B, C, N, O, Si, Ge and 3-d elements show the following characteristics:
(1) Special properties resulting from the bonding nature and geometrical symmery.
(2) New properties expected from confinement and interface.
(3) A variety of phonons as phonon engineering.
(4) Interplay among phonons, itinerant electrons and magnons.
Materials are synthesized using the strategy of natural aboundant ubiquitous elements for safety. Novel properties can be expected for advanced electronic devices. The structure of new materials can accurately be determined by various experimental techniques.

Targeted Application(s)/Industry

New materials produced by employing a new concept beyond the conventional methods can promote a new materials science for future electronics. Our research covers nano materials consisting of organic to innorganic elements. Thermoelectric materials for energy conversion and high mobility materials via Dirac quantum statse will be avialable for future electronic materials.

WPI Advanced Institute for Materials Research
TANIGAKI, Katsumi, Professor Doctor of Engineering

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

High Sensitivity Radioactivity Measurement at Ultra-Low Radioactivity Environment

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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-Performance Photoceramics via Green Processes

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The main objective of our research is to acquire profound understanding of "synthesis-structure-properties" relationship for the modern inorganic materials and to apply this knowledge for development of new materials with improved performance. The special attention is paid to the design of phosphors for white LEDs and photocatalysts with visible light response within oxide, oxynitride, oxynitride, and sulfide systems. The utilization of "green" solution processing towards these photoceramic materials is the paradigm of our group.

Targeted Application(s)/Industry

Through the synthesis of novel compounds in oxide, oxynitride, sulfide systems, development of new high-performance inorganic phosphors with various excitation and emission properties is possible. These high-performance phosphors are expected to be applied for the industrial use such as white light emitting diodes (white LEDs) and tools for sensing temperature.

Institute of Multidisciplinary Research for Advanced Materials
KAKIHANA, Masato, Professor Doctor of Science

High-Precision Capturing of 3-D Dental-Arch Shapes and Their Occlusal Relation and its Potential Implementation into CAD/CAM Dentistry

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In 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)/Industry

This 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.

Graduate School of Dentistry
HATTORI, Yoshinori, Professor DDS, PhD

High-speed and low-power asynchronous Network-on-Chip system based multiple-valued current-mode logic

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Global 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.
In our approach, a high-speed asynchronous data-transfer scheme is proposed based on multiple-valued encoding and current-mode circuits. The multiple-valued encoding enables to improve communication protocol essentially. Moreover, the current-mode circuits which has high-driving capability makes it possible to perform high-speed intra- and inter-chip network. By using this method, we expect that we can conduct effective collaborative research in high-speed and low-power communication LSIs such as a many-core LSI and a multi-module NoC.

Targeted Application(s)/Industry

Research Institute of Electrical Communication
HANYU, Takahiro, Professor PhD of Engineering

High-Speed Vision for Real-Time Motion Analysis

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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 X-ray phase tomography with a millisecond-order temporal resolution

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We successfully realized millisecond-order X-ray phase tomography using a fringe-scanning method in grating-based X-ray interferometry. We obtained phase tomograms with a measurement time of 4.43 ms using a white synchrotron X-ray beam. The use of a fringe-scanning method enables us to achieve not only a higher spatial resolution but also a higher signal-to-noise ratio than that attained by the Fourier transform method. In addition, our approach can be applied to realize four-dimensional or high-throughput X-ray tomography for samples that can be rotated at a high speed.

Targeted Application(s)/Industry

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
YASHIRO, Wataru, Associate Professor Doctor of Engineering

High-Temperature Processes and Measurements of Materials

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Fukuyama laboratory studies novel material processing based on chemical thermodynamics with high-temperature thermophysical property measurements. As examples, we are developing new crystal growth processes to bring a breakthrough in nitride-semiconductor devices, which are promising materials for next-generation optical devices applied in environmental, medical, bio and information technologies fields. Database of thermophysical properties of materials is needed for modeling heat and mass transports in materials processes.

Targeted Application(s)/Industry

A new thermophysical property measurement system is currently under development, which enables accurate measurements of heat capacity, thermal conductivity, emissivity, density and surface tension of high-temperature melts, utilizing electromagnetic levitation in a dc magnetic field.

Institute of Multidisciplinary Research for Advanced Materials
FUKUYAMA, Hiroyuki, Professor Doctor of Engineering

Highly Functional Semiconductor Lasers and Nanoimaging Applications

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We are pursuing the ultimate functions of semiconductor lasers and their application potentials. Concerning the application research aspect, development of advanced biomedical technologies, in which photonic methods play key roles, is an important issue. Such applied science field is called to be biophotonics, and a goal of our biophotonics research is to accomplish a high-resolution imaging for very deep sites of bio-tissues by employing nonlinear optical effects. Another important issue is the super-resolution "nanoimaging", which can provide nanometer-scale spatial resolution images by optical methods.
To realize the above functionalities, very advanced light sources are required. For example, features of ultrashort temporal duration, high peak-power, and broadband wavelength selectivity should be incorporated. With this background, we are developing highly functional light sources based on the semiconductor laser technologies; these light sources will be practical (real-world-use) ones, rather than just for scientific use. The core of our technology is the novel semiconductor laser, which can produce ultrashort and high-peak-power light pulses.

Targeted Application(s)/Industry

Regarding academic-industrial cooperative research subjects, we expect to produce novel functional light sources that are compact, stable, cost effective, and thus widely usable for real world applications. Advanced biomedical measurement and diagnostic systems with these light sources will be also developed.

New Industry Creation Hatchery Center (NICHe)
YOKOYAMA, Hiroyuki, Professor Doctor of Engineering

Highly Sensitive and Simultaneous Absolute Protein Quantification by LC-MS/MS

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Quantification of functional proteins in each organ of animals and humans at normal and disease states is fundamental for drug discovery and development. The target proteins were digested in-silico, and target peptides for analysis were chosen on the basis of the selection criteria. Samples tissues were digested with trypsin, and mixed with stable isotope labeled-peptide as a quantitative standard. The amounts of target proteins were simultaneously determined by the HPLC system connected to an ESI–triple quadrupole mass spectrometer. A detection limit would be ~ 1 fmol/assay and 37 different proteins could be quantified simultaneously.

Targeted Application(s)/Industry

This technology will be applicable for the drug discovery and development, diagnosis, personalized chemotherapy. This technology will be widely applicable for any life science relating industries including food and environment science. Fig. 3 summarizes possible applications for Pharmaceutical and Medical fields.

Graduate School of Pharmaceutical Sciences
TERASAKI, Tetsuya, Professor PhD,

Hormone Actions in Human Breast Carcinoma

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Breast cancer is one of the most common malignancies in women worldwide. Therefore, it is very important to investigate biological features of breast carcinoma in order to improve clinical outcome of the patients. It is well known that estrogens play important roles in the development of human breast carcinomas, and endocrine therapies are frequently used in these patients to block the intratumoral estrogen actions. In the Division of Pathology and Histotechnology, we analyze hormone actions in breast carcinoma by pathological methods as well as various molecular biological techniques.

Targeted Application(s)/Industry

It will be possible to newly develop diagnostic techniques regarding prediction of prognosis and/or effectiveness of treatment in breast cancer patients.

Pathology and Histotechnology, Graduate School of Medicine
SUZUKI, Takashi, Professor MD, PhD

Hybridized Organic and Polymer Nanocrystals for Optically Functional Materials

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Organic-inorganic hybridized nano-material is one of the most important objectives in current material science, which would provide peculiar properties and unique function induced by optoelectronic interactions at the interface. Aiming at the development of novel nanostructure toward photonic devices, we have tried to fabricate well-defined core-shell type hybridized nanocrystals and their ordered array structure, and to evaluate linear and nonlinear optical properties.

Targeted Application(s)/Industry

Optical devices will contribute the development in the information and commutations, medical field etc. in near future. In addition, these employed fabrication techniques will be applied smoothly to polymer industry so as to enhance remarkably properties in polymer composites.

Institute of Multidisciplinary Research for Advanced Materials
OIKAWA, Hidetoshi, Professor Doctor of Science

Hydrogen embrittlement of high strength steels

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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.

Targeted Application(s)/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