Tohoku University. Research Profiles

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"A" Theme - 26 Result(s)

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Analysis and Function Elucidation of Fine Clusters and Defects in Materials Invisible by Electron Microscopy

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It is well known that nano-scale impurity/solute clusters, defects, defect clusters and their complexes affect the mechanical and electrical properties in materials. However, it is very difficult to observe these objects even by state-of-the-art electron microscopes. We overcome the difficulty by employing noble two techniques: laser three-dimensional atom probe (3D-AP) technique and positron annihilation spectroscopy (PAS). Laser 3D-AP can map out each atom in various materials (metals, semiconductors, insulators) in three-dimensional real space with nearly atomic scale resolution. PAS can detect vacancy-type defects and defect-impurity complexes very sensitively.

Targeted Application(s)/Industry

By combining these methods, we are going to reveal the functions of the fine impurity clusters and defects to the materials: developments of new nano-structured materials, the mechanism of degradation of aged structural materials, the fall in the yield of semiconductor device production, and developments of quantum devices etc.

Institute for Materials Research
NAGAI Yasuyoshi, Professor PhD

Analysis of Biological Signals and Visualization

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Recent development of sensor technology and ICT have enabled collection and acculumation of huge amount and wide variety of biological data. We have been investigating analysis and processing methods of the biological data for supporting clinical diagnosis and health care. For example, development of extraction algorithm of fetal electrocardiogram from maternal abdominal siglnals, and estimation and visualization algorithms of status of autonomic functions based on diverse biological signals.

Targeted Application(s)/Industry

System development of biosignal anaysis, visualization, and diagnosis.
Development of monitoring and evaluation methods of alertness and sleepiness of traffic driver and workers.
Shift work scheduling based on circadian clock.

Graduate School of Information Sciences
NAKAO Mitsuyuki, Professor Doctor of Engineering

Analysis of Function of Functional Food Components Preventing Atherosclerosis

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We have much experience on basic studies including experimental animal research on improvement of lipid metabolism and prevention of obesity by functional food components. Causes of obesity and abnormality of lipid metabolism are complex, and measurement of enzyme activity and gene expression does not necessarily give us the precise information on mechanisms of improvement of lipid metabolism and prevention of obesity by food components.

Targeted Application(s)/Industry

Based on our experience, we are prepared to provide academic consultations to companies interested in our research. In some situations, we can conduct effective collaborative research in this field.

Food Function and Health, Graduate School of Agricultural Science
IKEDA Ikuo, Professor Doctor of Agriculture

Application of Nuroimaging Technique to Interface Evaluation

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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.

Targeted Application(s)/Industry

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.

Department of Quantum Science and Energy Engineering, Graduate School of Engineering
TAKAHASHI Makoto, Professor Doctor of Engineering

Applying Blended Learning to Special Needs Education

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I am interested in the human communication process and the man-machine interaction in some educational situation. I conducted interviews, questionnaires, behavior observations and experiments of students with special educational needs, their parents and teachers to investigate the needs, accessibility, usability, efficacy and its factors of blended learning and digital learning materials.

Targeted Application(s)/Industry

The outcomes of our research will make contribution to the design and development of teaching/learning materials and methods.

Graduate School of Educational Informatics Research Division
KUMAI Masayuki, Professor PhD

Assessment of Physical Activities Using Wearable Sensors

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Maintaining 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)/Industry

Together 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.

Graduate School of Biomedical Engineering
NAGATOMI Ryoichi, Professor M.D. & Ph.D.