| Name | Hiroaki Umehara |  |
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| Degree | Ph.D. (Science) | |||||||||||||||||||
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Modeling the relation between neural systems and brain waves, modeling signals based on Bayes inference, and applying them to information communications technology.
- Umehara, H., Okada, M. & Naruse, Y. Sequential Bayesian filters for estimating time series of wrapped and unwrapped angles with hyperparameter estimation. J. Phys. Soc. Jpn 87, 034005 (2018).
- Kushida, Y., Umehara, H., Hara, S. & Yamada, K. Momentum exchange impact damper design methodology for object-wall-collision problems. J. Vib. Control Article first published online: April 17, 2017.
- Umehara, H., Okada, M., Teramae, J. & Naruse, Y. Macroscopic neural mass model constructed from a current-based network model of spiking neurons. Biological Cybernetics 111, 91-103 (2017).
- Ihara, A.S., Ihara, S. A, Mimura, T., Soshi, T., Yorifuji, S., Hirata, M., Goto, T., Yoshinime, T., Umehara, H. &Fujimaki, N. Facilitated lexical ambiguity processing by transcranial direct current stimulation over the left inferior frontal cortex. Journal of Cognitive Neuroscience 27:1,26-34 (2015).
- Naruse, Y., Takiyama, K., Okada, M., Umehara, H. & Sakaguchi, Y. Phase shifts in alpha-frequency rhythm detected in electroencephalograms influence reaction time. Neural Networks 62, 47-51 (2015)
- Fujimaki, N., Terazono, Y., Ihara, S. A., Hayakawa, T., Matani, A. & Umehara, H. Accuracy of estimating strengths of dipole moments from a small number of magnetoencephalographic trial data. Brain Topography 27, 635-647 (2014).
- Naruse, Y., Takiyama, K., Okada, M. & Umehara, H. Statistical method for detecting phase shifts in alpha rhythm from human electroencephalogram data. Physical Review E 87, 042708 (2013)
- Leibnitz, K., Shimokawa, T., Umehara, H. & Murata, T. Topological Comparison of Brain Functional Networks and Internet Service Providers. IEICE Transactions on Communications , E95-B, 1539-1546 (2012).
- Ihara, A., Wei, Q., Matani, A., Fujimaki, N., Yagura, H., Nogai, T., Umehara, H. & Murata, T. Language comprehension dependent on emotional context: A magnetoencephalography study. Neuroscience Research 72, 50-58 (2012).
- Umehara, H., Takahashi, M., Otsubo T. & Kubo-oka, T. Scan by monitoring a pair of points - Optical survey method for near-geosynchronous orbits. Trans. JSASS Space Tech. Japan 3, 13-22 (2005)
- Nishinaga, N., Ogawa, Y., Takayama, Y., Takahashi, T., Kubo-oka, T. & Umehara, H. Reconfigurable communications satellite: SoftSAT. Space Communications 19, 149-158 (2005)
- Umehara, H. & McInnes, C. R. Penalty-function guidance for multiple-satellite cluster formation. Journal of Guidance Control And Dynamics 28, 182-185 (2005)
- Umehara, H. & Tanikawa, K. Improvement of the triple-encounter criterion. Publ. Astron. Soc. Japan 53, 693-697 (2001)
- Umehara, H. Potential-function guidance forming eccentricity separation of satellites with continuous thrust. Trans. Japan Soc. Aero. Space Sci. 44, 127-129 (2001)
- Umehara, H. & Tanikawa, K. Binary and triple collisions causing instability in the free-fall three-body problem. Celest. Mech. Dyn. Astron. 76, 187-214 (2000)
- Umehara, H. & Tanikawa, K. Orbital distribution arbitrarily close to the homothetic equilateral triple collision in the free-fall three-body problem with equal masses. Celest. Mech. Dyn. Astron. 74, 69-94 (1999)
- Tanikawa, K., Umehara, H. Oscillatory orbits in the planar three-body problem with equal masses. Celest. Mech. Dyn. Astron. 70, 167-180 (1998)
- Tanikawa, K., Umehara, H. & Abe, H. A search for collision orbits in the free-fall three-body problem: I. Numerical procedure. Celest. Mech. Dyn. Astron. 62, 335-362 (1995)
- Umehara, H. & McInnes, C. R. Quasi-Linear Optimization for Multiple-Spacecraft Clustering. 56th International Astronautical Congress of the International Astronautical Federation (2005)
- Umehara, H. Ground-Based Optical Scan and Parallel Orbit Determination of Near Geosynchronous Objects. 21st International Communications Satellite Systems Conference and Exhibit (2003)
