M. Konno, K. Okubo, T. Tsuchiya and N. Tagawa, “Performances of Various Types of Constrained Interpolation Profile Method for Two-Dimensional Numerical Acoustic Simulation，” Jpn. J. Appl. Phys., vol.47, no. 5 PART 2, pp.3962–3963, May 2008.
M. Tanabe, K. Okubo, N. Tagawa and T. Moriya, “Inline Transmitter/Receiver System Using Pb(Zn1/3Nb2/3)O3–PbTiO3 Single Crystal and Poly(vinylidene fluoride) for Harmonic Pulse Compression Imaging” Jpn. J. Appl. Phys., vol.47, no. 5, pp.4149–4154, May 2008.
T. Tsuchiya, K. Okubo, and N. Takeuchi, “Numerical Simulation of Nonlinear Sound Wave Propagation Using Constrained Interpolation Profile Method: One-Dimensional Case,” Jpn. J. Appl. Phys., vol.47, no. 5, pp.3952–3958, May 2008.
S. Xie, M. Tanabe, K. Okubo, N. Tagawa and T. Moriya, “Characteristics of Surface Particle Motion of Coiled Waveguide Caused by Flexural Ultrasonic aves，” Jpn. J. Appl. Phys., vol.47, no. 5, pp.4271–4275, May 2008.
K. Okubo, S. Oh, T. Tsuchiya, and N. Takeuchi, “Consideration of an absorbing boundary condition based on CIP method for finite-difference time-domain acoustic field analysis,” J. Acoust. Soc. Jpn, vol.30, no. 2, pp.132–135, Mar. 2009
K.Ishikawa, M.Ikeda, K.Okubo, and N.Tagawa, "High Accurate Motion Detection based on First and Second Order Gradient Equations", NICOGRAPH Int., May 2008.
J.Kawaguchi, T.Kusui, K.Okubo and N.Tagawa, "Direct 3-D Shape Recovery from Motion based on Multi-Scale Bayesian Network, NICOGRAPH Int., May 2008.
M.Tanabe, K.Okubo, N.Tagawa, and T.Moriya, "Evaluation of Inline Transmitter/Receiver System for Intravascular Ultrasound Imaging Using Pb(Zn1/3Nb2/3)O3-PbTiO3 Single Crystal and Polyvinylidene Fluoride", IEEE Int. Ultrason. Symp., vol.4, pp.1765–1768, Nov. 2008.
K.Tomoda, M.Ishiguro, M.Tanabe, K.Okubo, and N.Tagawa, "Rotation Phase Analysis of Surface Particle Motion of Coiled Waveguide caused by Flexural Ultrasound Wave", IEEE Int. Ultrason. Symp., pp.1461–1464, Nov. 2008.
N.Tagawa, J.Kawaguchi, S.Naganuma, and K.Okubo, ”Direct 3-D Shape Recovery from Image Sequence Based on Multi-Scale Bayesian Network”, 19th Int. Conf. Pattern Recognit., Dec. 2008.
M.Ikeda, K.Okubo, and N.Tagawa, "IMPLICIT TRACKING OF MULTIPLE OBJECTS BASED ON BAYESIAN REGION LABEL ASSIGNMENT", Int. Jt. Conf. Comput. Vision, Imaging Comput. Graph. Theory Appl., vol.2, pp.503–506, Feb. 2009.
M.Konno, K.Okubo, T.Tsuchiya and N.Tagawa, ”A consideration of multi-Dimensional Simulation of Nonlinear Acoustic Wave Propagation Using the CIP Method”, 30th Int. Symp. Acoust. Imaging, vol.30, Mar. 2009.
M.Fujiwara, K.Okubo and N.Tagawa, ”High Resolution Pulse Compression Imaging Using Super Resolution FM-Chirp Correlation Method (SCM)”，30th Int. Symp. Acoust. Imaging, vol.30, Mar. 2009.