M. Konno, K. Okubo, T. Tsuchiya and N. Tagawa, “Two-Dimensional Simulation of Nonlinear Acoustic Wave Propagation Using Constrained Interpolation Profile Method,” Jpn. J. Appl. Phys., vol.48, p.07GN01, Jul. 2009.
N. Akazawa, K. Okubo, and N. Tagawa, “Elastography Using Graph Cut Algorithm,” Jpn. J. Appl. Phys., vol.48, no. 7, p.07GJ05, Jul. 2009.
M. Tanabe, K. Okubo and N. Tagawa, “Inline Transmitter/Receiver System without Direct Receiving of Transmitted Signals,” Jpn. J. Appl. Phys., vol.48, no. 7, p.07GK13, Jul. 2009.
A. Takeuchi, K. Okubo, S. Watanabe, Y. Nakamura, and N. Takeuchi, “Electric and Ionic Environmental Circumstances Interacting at Hosokura Underground Mine in Northeast Japan,” IEEJ Trans, vol.129, no. 12, pp.870–874, Dec. 2009.
K.Okubo, N.Takeuchi, M.Utsugi, K.Yumoto, and Y.SASAI, ”DIRECT MAGNETIC SIGNALS FROM EARTHQUAKE FAULTING: IWATE- MIYAGI EATRTHQUAKE OF M7.2, JAPAN”, IAGA, Aug. 2009.
N.Akazawa, S.Ozawa, K.Okubo, and N.Tagawa, ”TWO-STEP DETECTION OF DISPLACEMENT FOR ELASTOGRAPHY USING GRAPH CUT”, Eighth Int. Conf. Ultrason. Meas. Imaging Tissue Elast., Sep. 2009.
K.Okubo, T.Tsuchiya, R.Seta, and N.Tagawa, ”A Novel Method for Numerical Simulation of Sound Wave Propagation Using Heptic Interpolation Profile Method”, IEEE Int. Ultrason. Symp., vol.2, pp.1579–1581, Sep. 2009.
M.Ohmiya, K.Okubo, T.Tsuchiya, and N.Tagawa, ”Numerical Simulation of Sound Wave Propagation Using Hybrid Technique Combining FDTD Method and CIP Method”, IEEE Int. Ultrason. Symp., vol.3, pp.1970–1972, Sep. 2009.
M.Tanabe, K.Okubo, and T.Tsuchiya, ”Development of Transducer System for Tissue Harmonic Imaging of Long Coded Signal”, IEEE Int. Ultrason. Symp., vol.3, pp.2700–2703, Sep. 2009.
R.Tanaka, M.Tanabe, K.Okubo, and N.Tagawa, ”Visualization of Flexural Wave Propagation in Helical Coiled Ultrasonic Waveguide”, IEEE Int. Ultrason. Symp., pp.2600–2602, Sep. 2009.
M.Fujiwara, K.Okubo, and N.Tagawa, ”A Novel Technique for High Resolution Ultrasound Imaging Using Super Resolution FM-Chirp Correlation Method (SCM)”, IEEE Int. Ultrason. Symp., vol.3, pp.2390–2393, Sep. 2009.
R.Seta, K.Okubo, and N.Tagawa, ”Digital Image Interpolation Method Using Higherorder Hermite Interpolating Polynomials with Compact Finite-Difference”, 2009 APSIPA Annu. Summit Conf., pp.406–409, Oct. 2009.
K.Okubo, A.Takeuchi, Y.Suyama, S.Watanabe, M.Utsugi, Y.Sasai, Y.Nakamura, and N.Takeuchi, ”Observation of Magnetic Signals from Earthquake Faulting: Co-faulting Signals in Iwate-Miyagi Earthquake of M 7.2, NE Japan”,AGU Fall Meet., Dec. 2009.
T.Alexandrova, Y.Suzuki, K.Okubo, and N.Tagawa, ”A Method for Realizing Threshold Image Secret Sharing”, IWAIT, Jan. 2010.
Y.Iida, N.Tagawa, K.Okubo, and T.Alexandrova, ”Depth recovery using camera motions imitating small involuntary eye movement”, IWAIT, Jan. 2010.
R.Seta, T.Alexandrova, N.Tagawa, and K.Okubo, ”Image Reconstruction Method Using Hermite Interpolation with High Accuracy Derivatives”, IWAIT, Jan. 2010.