"N" Keywords - 72 Result(s)

 N

[nonlinear oscillations]

Understanding and application of thermoacoustic phenomena

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特徴・独自性
  • Acoustic oscillations of a gas column in narrow flow channels can lead to various thermal phenomena such as production and amplification of acoustic power from heat and generation of low temperatures. We aim at understanding these thermoacoustic phenomena from experimental point of view, and developing heat engines that can operate without any moving parts like solid pistons.
実用化イメージ

Acoustic prime mover can use various heat sources like industrial waste heat and sunlight. Acoustic cooler is a Helium-gas based heat pump that needs no Freon gases as a coolant.

Researchers

Graduate School of Engineering

Tetsushi Biwa

[Nonprofit Organization]

Nonprofit Organizations and Social Capital

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特徴・独自性
  • Nonprofit organizations strive to solve community and social problems and to create new social values. Nonprofit organizations have the role to create citizenship and social capital - trust, norms and networks - in community. Social capital, an invisible and soft capital has increasingly become important to a sustainable management of an organization.
  • We hope to conduct collaborative research with willing corporations and organizations for measuring social capital at community/organizational levels and for making practical proposals on how to create and utilize social capital with viewpoints of partnership with nonprofit organizations and human resource development.
実用化イメージ

Researchers

Graduate School of Economics and Management

Yuko Nishide

[Nontoxic]

newColorful titanium oxide pigments without transition metals

概要

Colorful TiO2 Particle
https://www.t-technoarch.co.jp/data/anken_en/T19-849.pdf

従来技術との比較

Transition metal compounds are known to exhibit a wide variety of colors. Until now, it has been possible to color white titanium oxide by doping with transition metal ions, but it is difficult to avoid biotoxicity derived from transition metals.

特徴・独自性
  • In the present invention, titanium oxide inorganic pigments that do not contain transition metals and have various colors such as white, yellow, red, gray, green, purple, black, and skin color have been realized.
実用化イメージ

New applications of titanium oxide pigments are expected in the cosmetics field, where biotoxicity is an issue.

Researchers

Institute of Multidisciplinary Research for Advanced Materials

Yin Shu

[Nonvolatile logic]

PVT-Variation-Aware VLSI System Based on Nonvolatile-Device/MOS-Hybrid Circuitry

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特徴・独自性
  • Nonvolatile 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.
実用化イメージ

The 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.

Researchers

Research Institute of Electrical Communication

Takahiro Hanyu

[Nonvolatile memory]

Spintronics device

特徴・独自性
  • To realize ultralow-power and high-performance integrated circuit and information processing, spintronics physics, material, devices are studied.
実用化イメージ

Researchers

Research Institute of Electrical Communication

Shunsuke Fukami

[Nuclear magnetic resonance (NMR)]

Transport Control of Semiconductor Quantum Structures and Highly Sensitive NMR

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特徴・独自性
  • Highly-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.
実用化イメージ

Next 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.

Researchers

Center for Science and Innovation in Spintronics

Yoshiro Hirayama

[Nuclear materials]

newQuantitative analysis of microstructure in nuclear materials by week-beam scanning transmission electron microscopy

概要

We have developed a technique for quantitative analysis of microstructures (e.g., dislocations and irradiation defect aggregates) of activated and nuclear-burned specimens in the context of the Week Beam Scanning Transmission Electron Microscope (WB-STEM) method, which boasts extremely high measurement accuracy as a quantitative analysis method for lattice defects.
In combination with a dedicated heated sample holder with fully automated temperature measurement and current control in a cartridge-type heating furnace, changes in dislocation microstructure can be dynamically measured in-situ along with a highly reliable temperature history.

従来技術との比較

Conventional TEM methods require expertise in reciprocal space and dislocation theory, but our WB-STEM method is equipped with automatic analysis software for film thickness measurement and dislocation loop feature extraction, making it possible to analyze irradiation defects easily and precisely.

特徴・独自性
  • Since its design, the WB-STEM method has been developed for implementation and on-site repair in radiation controlled areas where nuclear materials are handled, with special aperture and diffraction disc selection equipment, control and analysis software.
  • WB-STEM accepts irradiation defect analysis of activated specimens from all over the world, including RPV monitoring specimens from European reactors and neutron-irradiated materials from US research reactors.
  • It is also used to analyze the properties of iron-containing nuclear fuel simulated debris in decommissioning projects.
実用化イメージ

We support research organizations that currently use transmission electron microscopy to observe microstructures to introduce the WB-STEM method by special modification. We will instruct researchers who have no experience using transmission electron microscopy in the procedure for dislocation analysis.

Researchers

Institute for Materials Research

Kenta Yoshida

[Nuclear Medicine]

Radiological Medical Infomatics

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特徴・独自性
  • PET and SPECT have very high sensitivity to detect molecule by means of radiation detection, and are considered to be excellent tools for molecular imaging. We are studying and developing data analysis techniques for PET and SPECT data. Using our approaches, we can analyze data in quantitative manner, and obtain physiological functions in living organism.
実用化イメージ

Pharmaceutical companies who are interested in using PET to evaluate efficacy of new drug. Companies which are related to medical informatics, medical equipments.

Researchers

Cyclotron and Radioisotope Center

Hiroshi Watabe

[Nuclear Power Plant]

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

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特徴・独自性
  • 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.
実用化イメージ

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.

Researchers

Graduate School of Engineering

Noritaka Yusa

[Numerical simulation]

[Nuroimaging]

Application of Nuroimaging Technique to Interface Evaluation

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特徴・独自性
  • Nuclear power plants, chemical plants, ironworks and smelters, aircrafts and others that involve large-scale and complex systems yield many benefits to society and daily life, but a serious accident in such systems may result in dire consequences and significant damage. As long as there is human intervention of any kind, it is difficult to completely avoid human error. In light of this, it is crucial to have the mindset of "to err is human, (to forgive divine)." Takahashi Laboratory advocates the improvement of safety based on the harmonization of humans, machines and the environment. The object of our research is the human. Incorporating neuroscience approach and knowledge, we probe into human cognitive and behavioral traits and reflect our findings back into our research with the cooperation of this university's Institute of Development, Aging and Cancer as well as practicing specialists and technical experts. Through our broad vision, flexible mindset and creativity, we pioneer interfaces between humans and systems where safety is ingrained.
実用化イメージ

The core of our research is the examination and understanding of the human factor to be taken into account for the safe and efficient operation of large scale, complex systems, and we are involved in the research of a wide array of subjects not limited to nuclear energy systems but air traffic control operations, man-machine interfaces, cyber security, standardization of rules among others.

Researchers

Graduate School of Engineering

Makoto Takahashi

[Nutrition]

Smart Ageing Initiative

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特徴・独自性
  • In Japan, the percentage of elderly people aged 65 years or over was 23.1% in 2010. It is no doubt that Japan is the world's first super-aging society. In such a super-aging environment, it is necessary to form a society in which each individual can play an active role even as one becomes older in order to maintain and improve the quality of life of all people and to maintain a healthy society. In advanced brain science, research from the fields of brain function imaging, cognitive science, and psychology has been utilized with the aim of realizing a healthy aging society. Up to date information on various new technologies and related discoveries has been disseminated so that individuals can live a healthy life with peace of mind at every stage of aging, while maintaining and improving the health of their brain and mind in a diverse and complex society.
実用化イメージ

We believe to overcome super-aging environments is not only an object of public concern but also big business chances to create new industries.

Researchers

Institute of Development, Aging and Cancer

Ryuta Kawashima