The Permutational Graph: A New Network Topology. - S. Okawa (Int. J. Found. Comput. Sci., 1998)

Low-peak pseudo-white-noise arrays. - Takafumi Hayashi; S. Okawa (IEEE Signal Process. Lett., 2004)

Binary array set having a cross-shaped zero-correlation zone. - Takafumi Hayashi; S. Okawa (IEEE Signal Process. Lett., 2004)

Reduction of noise from magnetoencephalography data. - S. Okawa; S. Honda (Medical Biol. Eng. Comput., 2005)

Reduction of Poisson noise in measured time-resolved data for time-domain diffuse optical tomography. - S. Okawa; Y. Endo; Yoko Hoshi; Yukio Yamada (Medical Biol. Eng. Comput., 2012)