"S" Keywords - 160 Result(s)
S
[Spintronics]
Theoretical Design of New Materials and Device Functionality based on First-principles CalculationsFeaturesWe are doing theoretical research on electrical conductivity in magnetoresistive devices using highly spin-polarized materials. The aim is to achieve very functional spintronics devices such as read-out heads for ultrahigh-density magnetic recording and non-volatile spin memories. We also investigate magnetoresistive devices using perpendicularly magnetized materials to ensure endurance against thermal fluctuations of the magnetization. We successfully achieve a guideline for improvement of the magnetoresistive performance by designing the crystal structure at the interface between ferromagnets and oxides theoretically. Research Institute of Electrical Communication
SHIRAI Masafumi, Professor
Doctor of Engineering
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Spintronics Devices and MaterialsFeaturesSpintronics is a technology utilizing electron spin which provided magnetic sensor, nonvolatile magnetic memory, and so on. Our studies are as below. Targeted Application(s)/IndustryMagnetic memory and storage. Microwave and Terahertz wave. Magnetic sensors. WPI Advanced Institute for Materials Research
MIZUKAMI Shigemi, Professor
Doctor of Engineering
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Development of High Sensitive Magnetic Sensor Operating at Room Temperature with Tunnel Magnetoresistance DevicesFeaturesRecently, many tunnel magnetoresistance devices with high magnetoresistance effect are reported. These are expected to be applied to high sensitive magnetic sensors. There are many magnetic sensors with variety of the mechanism, in order to meet the demand of the very wide range of sensing magnetic field. However, there is no magnetic sensor which has high sensitivity, easy to use, operation at room temperature and low cost. Only a magnetic sensor with tunnel magnetoresistance devices can satisfy all the demand in principle. As the device has very wide range of the sensing magnetic field, it can be designed for any demand to the sensors. Targeted Application(s)/IndustryFor example, this device can sense a bio-magnetic field easily at room temperature, so that it could be replaced SQUID device, which is popular now but is very expensive and not easy to use personally. Therefore, by using this device, we expect we can conduct effective collaborative research in medical field. Department of Applied Physics, Graduate School of Engineering
ANDO Yasuo, Professor
Doctor of Engineering
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Novel-Concept Silicon Integrated Circuits Derived from the 3-Dimensional Device, Circuit and ArchitectureFeaturesIn recent year, facing the age of nanoscale engineering, the new technologies of device, circuit and architecture supported by novel physical guidance principles are highly expected, just as the similar situation as the predawn of semiconductor technology when Bardeen and Shockley discovered the secret of transistors. Therefore, in our research approach, the architectures, circuits, devices and CAD design tools for nanoscale LSI are systematically investigated in the following three main research subjects. Targeted Application(s)/IndustryCenter for Innovative Integrated Electronic Systems
ENDOH Tetsuo, Professor
Doctor of Engineering
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[Spintronics device]
Spintronics deviceFeaturesTo realize ultralow-power and high-performance integrated circuit and information processing, spintronics physics, material, devices are studied. Research Institute of Electrical Communication
FUKAMI Shunsuke, Professor
Doctor of Engineering
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[stainless steel]
Suppression of Intergranular Degradation of Polycrystalline Materials by Grain Boundary EngineeringFeaturesIntergranular 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)/IndustryBy 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.
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Development of the Nickel-Free Dental Magnetic Attachment Using the Magnetic Shielding Material which Lost its Magnetism by Nitrogen-Solid SolutionFeaturesIn the dental magnetic attachments which retain dentures, superstructures of dental implants, and so on, the non-magnetic stainless steel containing nickel is used in order to reinforce their retentive force by a magnetic circuit. The surface layer of magnetic stainless steel which loses its magnetism by nitrogen-solid solution obtained from heating in nitrogen gas at high temperature, enable to form a magnetic circuit, which does not contain nickel at all, and to reduce its components and manufacturing processes. The method using the nitrogen-solid solution in this study is warrantable to manufacture the nickel-free dental magnetic attachment with high safety. Targeted Application(s)/IndustryThe nickel-free magnetic attachment realizes a retainer with higher safety, and can expect the application to medical and dental care for clinical uses, such as not only a denture but a dental implant, an epithese, and so on with easy desorption. Division of Dental Biomaterials, Graduate School of Dentistry
TAKADA Yukyo, Associate Professor
Doctor of Engineering
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[Statistical Mechanics]
Optimizing everything / Optimal SocietyFeaturesAiming at developing practical quantum optimization technology known as quantum annealing, we are working on exploring basic technologies that can overcome the limitations and applications in collaboration with multiple companies. The advantage of the method is that it can be used simply by formulating a cost function that draws the goal to be optimized once, but we are not limited to the original method. We extend it by considering a much easier problem, sequential optimization by learning, black box optimization, etc.. In particular, it is being applied to automated driving, logistics in factories, and evacuation guidance during disasters. Targeted Application(s)/IndustryApplications to route search problems such as automatic driving of various vehicles, evacuation route guidance at the time of disaster, process scheduling and a large number of combination problems. We can provide a solution to combinatorial optimization in each industry. (Transportation / distribution, manufacturing, materials, drug discovery, etc.) Graduate School of Information Sciences, Applied Information Sciences, Information and Applied Technology, Physical Fluctuomatics
OHZEKI Masayuki, Professor
Doctor of Science
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[Statistical Science]
Data Analytics for Creation of Social ValuesFeaturesMy research field is a data analytics for creation of social values by data science approaches. In modern society, we can observe various data sets about our daily life, business or community. I aim to create new services for it using such data set and methods of Bayesian modeling, data mining or machine learning. Targeted Application(s)/IndustryGraduate School of Economics and Management
ISHIGAKI Tsukasa, Associate Professor
Doctor of Philosophy
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[statistics]
Advanced Analysis of Socio-Economical Data for Capturing Social NeedsFeaturesWe have proposed advanced methods of behavior analysis for public transport service. Targeted Application(s)/IndustryWe welcome cooperative research on demand analysis of public services, as well as needs analysis for new goods and services. International Research Institute of Disaster Science
OKUMURA Makoto, Professor
Doctor of Engineering
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[steel]
Advanced Control of Microstructure and Property of Structural Metallic MaterialsFeaturesMicrostructure represents various kinds of heterogeneities in the metallic materials, i.e., grains, component phase, lattice defects and chemical inhomogeneity such as impurity/alloying elements. It can be modified through control of phase transformation/precipitation and deformation/recrystallization by adjusting compositions of materials and/or through processing routes (heat treatment, deformation). Such expertise in micro/nanostructure control is very important in production of current materials from viewpoints of energy saving and recycling in structural materials such as steels and titanium alloys. Targeted Application(s)/IndustryPossibilities to establish new functions (e.g., superplasticity, shape memory/superelasticity) as well as superior mechanical properties (e.g., ultrahigh strength with high toughness/ductility) is also explored. |
[Steel Moment Resisting Frames]
Proposal of New Column Support System for Multi-Story Steel Moment Resisting Structures to Perform Beam Yielding MechanismFeaturesFor the moment resisting frames with fixed column bases, the soft story mechanism may occur during earthquake due to become plastic hinges at the bottom part of columns. This paper proposes the new support system on the first story whose columns consist of the reinforced concrete downside column and the steel topside column, and their joints with the anchor bolts and the shear plates are supposed to be pinned. It is possible for the frames with this support system to uniform the magnitude of the bending moment at column top and base, and to perform beam yielding mechanism for 6 and 9 story frames with 2.1 of the column-to-beam full plastic moment ratio. Targeted Application(s)/IndustryIn this column support system, the 1st story column consists of steel topside column and reinforced concrete downside column, whose connection at the midstory performs as a pin. New Industry Creation Hatchery Center
KIMURA Yoshihiro, Professor
Doctor of Engineering
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[stent]
Biomodel for Development of Endovascular TreatmentFeaturesWe perform in-vitro or computational researches for development of medical devices. We develop a model of artery or bone to evaluate medical devices. And we apply optimization way for development of medical devices. Our main target is, currently, stent, or catheter. Targeted Application(s)/IndustryOur collaboration company can be; medical equipment, device, medical image, MEMS, standardization, medical training, or polymer. |
[step length]
Assessment of Physical Activities Using Wearable SensorsFeaturesMaintaining appropriate amount of physical activity is essential for health and disease prevention. Gait is the most common type of physical activity in everyday life. Monitoring the amount of physical activity in everyday lives may benefit mainly those who are at threat of metabolic syndrome and overweight. Towards better estimation of the amount of physical activity utilizing wearable sensors, we focused on taking running and walking economy into account. The relationship between step length and oxygen uptake was first determined. Step length estimation with moderate accuracy was accomplished using acceleration signals during walking. Step length was then taken into energy expenditure calculation as one of the variables. Targeted Application(s)/IndustryTogether with the basic version of the current locomotion monitoring system capable of counting staircase climbing up & down, we managed to upgrade our locomotion monitoring system into 3 dimensional. |
[Stereoscopic Display]
Interactive Content to Enrich Our LivesFeatures(1) Displays and Interactive Techniques Targeted Application(s)/IndustryResearch Institute of Electrical Communication
KITAMURA Yoshifumi, Professor
Doctor of Engineering
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[Sterilization]
Development of next-generation sterilization method by a plasma flow at atmospheric pressureFeaturesPlasma sterilization has been developed as an alternative sterilization method due to its chemical activity, operation at low temperature and atmospheric pressure, low power consumption, low cost and safety. We have studied a mechanism of chemical species generation and transport in a plasma flow and, the sterilization efficacy and mechanism for several plasma sources at atmospheric pressure, such as a microwave plasma flow, a dielectric barrier discharge in a tube and a water vapor plasma flow. We already clarified that the damages of outer membrane and destructions of the cytoplasmic membrane of Escherichia coli by exposure to the microwave plasma flow. Fig. 1 shows the effect of plasma exposure on the E. coli. When the E. coli was exposed to the plasma, the height of the E. coli decreased and the potassium leakage of cytoplasmic material increased. For sterilization in a tube, we also clarified that an induced flow in the narrow tube by DBD transports chemical species and sterilize the whole inside surface of a tube as shown in Fig. 2. We hope to conduct collaborative research with a willing company for a practical application of this technology in industry. |
[Steroid]
Hormone Actions in Human Breast CarcinomaFeaturesBreast 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)/IndustryIt 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
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[Streaming]
Internet video streams have identities like fingerprintsFeaturesAccording to recent studies, each video that is streamed online has its own unique characteristic. The pattern of data that are sent through the network can vary from one encoding method to another and the change from scene to scene, which is a unique characteristic of each video. This research aims to identify video content in the network without looking at the data itself. Targeted Application(s)/IndustryThis research would be especially useful in preventing illegal distribution of television program such as illegal channel without violating user privacy. Another application would be to prevent confidential online meeting from leaking outside local enterprise network. In addition, it is also possible to investigate the circulation of a video content using method introduced by this work. |
[strengeness nuclear physics]
Experimental Nuclear PhysicsFeatures1) Study of strangeness nuclear physics and hypernuclei with high energy electron/photon beams Targeted Application(s)/IndustryDepartment of Physics, Graduate School of Science
NAKAMURA Satoshi N., Professor
Doctor of Science
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[strength]
Advanced Control of Microstructure and Property of Structural Metallic MaterialsFeaturesMicrostructure represents various kinds of heterogeneities in the metallic materials, i.e., grains, component phase, lattice defects and chemical inhomogeneity such as impurity/alloying elements. It can be modified through control of phase transformation/precipitation and deformation/recrystallization by adjusting compositions of materials and/or through processing routes (heat treatment, deformation). Such expertise in micro/nanostructure control is very important in production of current materials from viewpoints of energy saving and recycling in structural materials such as steels and titanium alloys. Targeted Application(s)/IndustryPossibilities to establish new functions (e.g., superplasticity, shape memory/superelasticity) as well as superior mechanical properties (e.g., ultrahigh strength with high toughness/ductility) is also explored. |