Publications by Dr. Warsito P. Taruno


Peer Reviewed Journals and Conference Proceedings

  1. Fei Wang, Qussai Marashdeh, Liang-Shih Fan and W. Warsito, “Electrical Capacitance Volume Tomography: Design and Applications,” Sensors 2010, 10, Pages 1890-1917.
  2. Q. Marashdeh, L.-S. Fan, B. Du, and W. Warsito, “Electrical Capacitance Tomography − A Perspective,” Ind. Eng. Chem. Res., 2008, 47 (10), 3708-3719.
  3. Qussai Marashdeh, Warsito Warsito, Liang-Shih Fan and Fernando Teixeira, “Dual imaging modality of granular flow based on ECT sensors,” Granular Matter, Volume 10, Number 2/January, 2008, Pages75-80.
  4. Marashdeh, Q.; Fei Wang; Liang-Shih Fan; Warsito, W.,”Velocity Measurement of Multi-Phase flows Based on Electrical Capacitance Volume Tomography,” IEEE Sensors, 2007, Volume , Issue , 28-31, Page(s):1017 – 1019
  5. W. Warsito, Q. Marashdeh, & L.S. Fan, “Electrical Capacitance Volume-Tomography,” IEEE Sensors Journal (2007), Vol.7, 4, 525-535.
  6. W. Warsito, Q. Marashdeh, & L.S. Fan, “Some comments on “Spatial imaging with 3D capacitance measurements” by R.Wajman, R. Banasiak, L. Mazurkiewicz, T. Dyakowski and D. Sankowski (Meas. Sci. Technol., Vol. 17 (2006), pp.2113–2118),” Meas. Sci. Technol. 2007, 18 3665-3667.
  7. Q. Marashdeh, W. Warsito, L.-S. Fan, and F.L. Teixeira “Multimodal Tomography System Based on ECT Sensors”. IEEE Sensors Journal, (2007), VOL. 7, NO. 3, 426-433.
  8. Q. Marashdeh, W. Warsito, L.-S. Fan, and F.L. Teixeira, “Nonlinear Forward Problem Solution for Electrical Capacitance Tomography Using Feed-Forward Neural Network”. IEEE Sensors Journal, (2006), 6 (2), 441-449.
  9. Du, Bing; Warsito, W.; Fan, Liang-Shih. “Behavior of the Dense-Phase Transportation Regime in a Circulating Fluidized Bed”, Industrial & Engineering Chemistry Research,(2006), 45 (10), 3741-3751.
  10. Du, Bing; Warsito, W.; Fan, Liang-Shih. “Flow Dynamics of Gas-Solid Fluidized Beds with Evaporative Liquid Injection”, China Particuology,(2006), 4 (1), 1-8.
  11. Du, Bing; Warsito, W.; Fan, Liang-Shih. “Imaging the Choking Transition in Gas-Solid Risers Using Electrical Capacitance Tomography”, Ind. Eng. Chem. Res.2006, 45, 5384-5395.
  12. Q. Marashdeh, W. Warsito, L.-S. Fan, and F.L. Teixeira: “A nonlinear image reconstruction technique for ECT using a combined neural network approach”. Meas. Sci. and Technol., 17 (2006), 2097–2103.
  13. W. Warsito & L.S. Fan, “Dynamics of spiral bubble plume motion in the entrance region of bubble columns and three-phase fluidized beds using 3D ECT,” Chemical Engineering Science, (2005), 60, 6073 -6084.
  14. B. Du, W. Warsito, L.S. Fan, “ECT Studies of Gas-Solid Fluidized Beds of Different Diameters”, Ind. Eng. Chem. Res., (2005), 44, 5020-5030.
  15. B. Du, W. Warsito, L.S. Fan, “ECT Studies on Choking Phenomena in a Circulating Fluidized Bed” AIChE Journal 50 (7), 1386-1406 (2004).
  16. W. Warsito, B. Du & L.-S. Fan, ”Electrical capacitance tomography imaging of gas-solid and gas-solid-liquid fluidized bed systems,” Journal of Visualization 7 (1), Frontispiece (2004)
  17. W. Warsito, B. Du & L.-S. Fan, “Real-time ECT studies of choking phenomenon and flow behavior in a FCC riser,” Japanese J. of Multiphase Flow 17(3), Frontispiece (2003).
  18. W. Warsito & L.S. Fan, “Neural network multi-criteria optimization image reconstruction technique (NN-MOIRT) for linear and non-linear process tomographic imaging of two- and three-phase flow systems,” Chemical Engineering and Processing, 42 (8-9),663-674, 2003.
  19. W. Warsito & L.S. Fan, “ECT imaging of three-phase fluidized bed based on three-phase capacitance model,” Chemical Engineering Science, 58, 823-832 (2003).
  20. B. Du, W. Warsito & L.S. Fan, “Bed Nonhomogeneity in Turbulent Gas-Solid Fluidization,” AIChE J 49(5), 1109-1126 (2003).
  21. W. Warsito & L.S. Fan “3D-ECT Velocimetry for Flow Structure Quantification of Gas-Liquid-Solid Fluidized Beds,” Canadian J of Chem. Eng. 81, 875-884 (2003).
  22. B. Du, L.S. Fan, F. Wei & W. Warsito, “Gas and solids mixing behavior in a turbulent fluidized bed,” AIChE J 48, 1896-1909 (2002).
  23. W. Warsito & L.S. Fan, “Neural Network Based Multi-Criteria Optimization Image Reconstruction Technique for Imaging Two- and Three-Phase Flow Systems Using Electrical Capacitance Tomography,” Meas. Sci. and Technol. 12, 2198-2210 (2001).
  24. L.S. Fan, R. Lau, C. Zhu, K. Vuong, W. Warsito, X. Wang & G. Liu, “Evaporative Liquid Jets in Gas-Liquid-Solid Flow Systems,” Chem. Eng. Sci. 56, 5871-5891 (2001).
  25. W. Warsito & L.S. Fan, “Real time measurement of flow structures in gas-liquid and gas-liquid-solid flow systems using electrical capacitance tomography,” Chem. Eng. Sci., 56, 6455-6462 (2001).
  26. M.B. Utomo, W. Warsito & S. Uchida, “Analysis of hydrodynamics of slurry bubble column with TiO2 using ultrasonic computed tomography,” Chem. Eng. Sci. 56, 6073-6079 (2001).
  27. Y. Suzuki, W. Warsito, M. Maezawa & S. Uchida, “Liquid-Solid Separation of Photo-catalyst Induced by Ultrasound,” Chemistry Letters 2, 130-131 (2000).
  28. W. Warsito, Utomo, M.B. & S. Uchida, “Ultrasonic computed tomography for measuring cross-sectional distributions of solid and gas concentrations in three-phase bubbly flow,” Japanese J. Multiphase Flow 14 (4), 434-441(2000).
  29. Y. Suzuki, W. Warsito, M. Maezawa & S. Uchida, “Effects of Frequency and Aeration on Ultrasonic Induced Decomposition of Surfactant,” Chem. Eng. Technol. 22, 507-510, 1999.
  30. W. Warsito, M. Ohkawa, N. Kawata & S. Uchida, “Cross-sectional Distributions of Gas and Solid Concentrations in a Slurry Bubble Column Measured by Ultrasonic Computed Tomography,” Chem. Eng. Sci. 54, 4711-4728 (1999).
  31. Y. Suzuki, W. Warsito, M. Maezawa & S. Uchida, “Ultrasonic enhancement of photo-catalytic oxidation of surfactant,” International J. of Photoenergy 1, pp.55-60, 1999.
  32. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Radial Solid Concentration Profiles in a Slurry Bubble Column Measured by Ultrasonic Method,” J. Chem. Eng. Japan 30(5), 786-792 (1997).
  33. W. Warsito, M. Ohkawa, A. Maezawa & S. Uchida, “Flow Structure and Phase Distributions in Slurry Bubble Column,” Chem. Eng. Sci. 52, 21/22, 3941-3947(1997).
  34. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Hydrodynamics Analysis in Slurry Bubble Column Using Ultrasonic Technique,” Reports of The Graduate School of Electronic Science and Technology 17, Shizuoka University, 131-136 (1996).
  35. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “A Model for Simultaneous Measurement of Gas and Solid Holdups in a Bubble Column,” Canadian J. Chem. Eng. 73, 734-743 (1995).
  36. S. Uchida & W. Warsito, “Measurement of Gas and Solid Holdups in a Slurry Bubble Column Using Technique, Chemical Engineering 37, 27-32 (1994).
  37. Wang Fei, W. Warsito, Q. Marashdeh, and L.S. Fan, “Imaging Horizontal Gas/Solid Jet Penetration in A Gas-solid Fluidized Bed Using Electrical Capacitance Volume Tomography,” Proceedings of AIChE Annual Meeting, P124454, Philadelpia, 2008.
  38. Q. Marashdeh, W. Fei, W. Warsito, and L.-S. Fan “Electrical Capacitance Volume Tomography 3D Velocimetry,” Proc. Of 3rd International Workshop of Industrial Process Tomography (IWPT-3), 17-19 April, 2008, Tokyo, Japan.
  39. B. Du, Q. Marashdeh, W. Warsito, A.-H. A. Park and L S Fan, “Development of Electrical Capacitance Volume Tomography (ECVT) and Electrostatic Tomography (EST) for 3D Density Imaging of Fluidized Bed System,” ECI Conference on The 12th International Conference on Fluidization – New Horizons in Fluidization Engineering, Vancouver, Canada, May 13-17, 2007, pp. 472-480.
  40. W. Warsito, Q. Marashdeh, & L.S. Fan, “Real Time Volumetric Imaging of Multiphase Flows using electrical capacitance tomography,” Proc. of the 5th World Congress on Industrial Process Tomography, Bergen, Norway (2007).
  41. Q. Marashdeh, W. Warsito, & L.S. Fan, “Real Time Volumetric Imaging of Multiphase Flows using electrical capacitance tomography,” Proc. of the 5th World Congress on Industrial Process Tomography, Bergen, Norway (2007).
  42. W. Warsito, Q. Marashdeh, & L.S. Fan, “Real Time 3-Dimensional Electrical Capacitance Tomography (3D-ECT): Sensor Design and Image Reconstruction,” Proc. of the 4th World Congress on Industrial Process Tomography, Aizu, Japan (2005).
  43. Q. Marashdeh, W. Warsito & L.S. Fan, “Neural Network Solution for the forward problem in electrical capacitance tomography,” Proc. of the 4th World Congress on Industrial Process Tomography, Aizu, Japan (2005).
  44. W. Warsito & L.S. Fan, “Development of three-dimensional electrical capacitance tomography” Proc. of 3rd World Congress on Industrial Process Tomography, Banff, Canada, 2-5 Sept. 2003.
  45. W. Warsito & L.S. Fan,“Real Time and Quasi-3D Imaging of Gas-Liquid Flow Using Electrical Capacitance Tomography” Proc. of the 4th ASME-JSME Joint Fluids Engineering Conference, Honolulu, Hawaii, July 6-11, 2003.
  46. W. Warsito & Fan, L.S., “ECT imaging of three-phase fluidized bed based on three-phase capacitance model,” Proc. of the 17th Intl Symposium on Chemical Reaction Engineering, Hong Kong, China, August, 2002.
  47. W. Warsito & Fan, L.S, “Flow dynamics of gas-solid fluidized bed with evaporative liquid jet injection measured by real time electrical capacitance tomography,” Proc. of the 4th World Congress on Particle Technology, Sydney, Australia, July, 2002.
  48. Y. Suzuki, W. Warsito, A. Maezawa & S. Uchida, “The Kinetics of surfactant degradation induced by ultrasound,” Proc. of 2nd Asia-Pacific Chem. Reaction Engng Sympo. ’99 (APCRE’99) HONG KONG, July, 1999.
  49. Y. Suzuki, W. Warsito, A. Maezawa & S. Uchida, “Effect of Aeration on Ultrasonic Induced Degradation of Surfactant,” Proc. of 6th Asian Conf. on Fluidized-Beds and Three-Phase Reactors (ASCON FBR ’98), Cheju, Korea, Dec., 1998, pp. 249-253
  50. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Distributions of Gas and Solid Holdups in Slurry bubble Column Measured by Ultrasonic Method,” Proc. of 5th World Congress of Chem. Engng, A. I. Ch. E., San Diego, USA, July, 1996, 271- 276.
  51. W. Warsito, A. Maezawa & S. Uchida, “Bubble-wake and Particle Diffusion Model to Predict the Radial Solid Concentration Profiles in Three-Phase Fluidized Bed,” Proc. of 5th Asian Conf. on Fluidized-Beds & Three-Phase Reactors (ASCON FBR ’96), Hsitou, Taiwan, Dec. 1996, pp. 131-136.
  52. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Method for Simultaneous Measurement of Gas, Liquid and Solid Holdups in Slurry Bubble Column Using Ultrasonic Technique,” Proc. Of 4th Asian Conf. on Fluidized-Beds and Three-Phase Reactors, (ASCON FBR ’94), Fukuoka, 1994, pp. 131-136.

Book Chapters

  1. S. Uchida, A. Maezawa, W. Warsito, M. Ohkawa, N. Kawata and S. Okamura, “Measurement of Cross-Sectional Distributions of Gas and Solid Concentrations in a Slurry Bubble Column by Ultrasonic Computed Tomography,” SCEJ Symposium Series 59: Bubble Column and Slurry Bubble Column, 1999.
  2. W. Warsito, A. Maezawa, T. Kazuyori, S. Uchida and S. Okamura, “Measurement of Gas and Two-Solid Holdups in Two-Particle Suspended Bubble Column Using Ultrasonic Method,” SCEJ Symposium Series Vol. 50: Bubble Column and Slurry Bubble Column, pp.120-125, 1996.

Conference Proceedings, Abstracts, Reports and Presentations

  1. Qussai M. Marashdeh, Mohammad Hadi, L.S. Fan, and W. Warsito, ”On the ECT Sensor Based Dual Imaging Modality System for Electrical Permittivity and Conductivity Measurements,” AIChE Spring National Meeting, Orlando, Florida, 24-27 April 2006, #245 – Measurement Methods in Particle Technology – Three-dimensional Techniques (TWA14)
  2. B Du, W Warsito, LS Fan, “Transient 3-Dimensional Behavior of Gas-Solid Fluidization Measured Using Electrical Capacitance Volume Tomography (Ecvt),” AIChE Annual Meeting in Cincinnati, OH, March, 2005.
  3. B. Du, W. Warsito & L.S. Fan, “Choking study in circulating fluidized bed using 3D-ECT,” with Bing Du and L.S. Fan, AIChE Annual Meeting in Austin, Texas, November, 2004.
  4. W. Warsito, “Fluidization: Key technology for Indonesian chemical industries,” Seminar Nasional Teknologi Proses Kimia, Jakarta, 31 March, 2004.
  5. W. Warsito, “State of the art experimental techniques for bioreactor design and analysis,” Plenary Section, Conference on Industrial Enzyme and Biotechnology (CIEB ’03), Jakarta, Indonesia, Oct. 2003.
  6. B. Du, W. Warsito & L.S. Fan, “Real time, 3-D ECT imaging of multiphase flow systems,” Paper 509c, AIChE Annual Meeting in San Francisco, November 16-21, 2003.
  7. B. Du, W. Warsito & L.S. Fan, “Axial Variations of Solids Flow Structures in Dense Fluidization Regime of a Circulating Fluidized Bed,” Paper 37a, AIChE Annual Meeting in San Francisco, November 16-21, 2003.
  8. B. Du, W. Warsito & L.S. Fan, “Choking Phenomena in Gas-Solid Fluidization Systems,” with L.S. Fan and Bing Du, AIChE Annual Meeting, Indianapolis, IN, USA, Nov. 3-8, 2002.
  9. W. Warsito & L.S. Fan, “Study on Transient Phenomena of Bubbles in Bubble Column and Three-phase Fluidized Bed Using ECT,” AIChE Annual Meeting, Indianapolis, IN, USA, Nov. 3-8, 2002.
  10. B. Du, W. Warsito & L.S. Fan, “Solids Flow Behavior in a Turbulent Fluidized Bed under High Temperatures and Pressures with Fines Addition,” AIChE Annual Meeting, Reno, NV, USA, 4-9 (2001).
  11. W. Warsito, A. Maezawa, S. Uchida and S. Okamura, “Measurements of Gas and Solid Holdups in Gas-Liquid-Solid Dispersion Systems Using Ultrasonic Technique,” Proc. of Muroran Meeting, The Soc. Chem. Engineers, Japan, Muroran, Japan, July 1992, A111.
  12. W. Warsito and Fan, L.S, “Development of Measuring Technique for 3-D Bubble Velocity in Two-phase System using Electrical Capacitance Tomography,” AIChE Annual Meeting, Reno, NV, USA, Nov. 4-9, 2001.
  13. M.B, Utomo, W. Warsito & S. Uchida, “Analysis of hydrodynamics of slurry bubble column with TiO2 using ultrasonic computed tomography,” Proc. of the 5th Intl Symposium on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering, Melbourne, Australia, August, 2001.
  14. W. Warsito and Fan, L.S, “Real Time Flow Structures in Bubble Column and Dense Three-Phase Fluidized Beds Measured by Electrical Capacitance Tomography,” Proc. Of Intl. Conf. on Multiphase Flow, New Orleans, LA, July, 2001.
  15. Marsudi B. Utomo, W. Warsito & S. Uchida, “Measurement of Cross-Sectional Distributions of Gas and Solid Holdup using Neural Network-Ultrasonic Computed Tomography (NN-UCT)”, Proc. of The 2nd Conference of Japanese Society for Multiphase Flow, International Session, Kita Kyushu, 165-168 (2001).
  16. L.S. Fan, W. Warsito, D.J. Lee & G.Q. Yang, “Experimental Frontiers in Gas-Liquid and Gas-Liquid-Solid Flow Systems,” Proc. of International Conference on Computed Fluid Dynamics, Quebec City, Canada, August, 2000.
  17. Y. Suzuki, H. Arakawa, W. Warsito , A. Maezawa, S. Okamura, S. Uchida & M. Yano, “Solid catalyst solid-liquid separation using ultrasonic illumination, Proc. of 32nd Autumn Symposium, The Soc. Chem. Engineers, Japan, Kanazawa, July 1999.
  18. Y. Suzuki, H. Arakawa, W. Warsito , A. Maezawa, S. Okamura, S. Uchida & M. Yano, “Ultraviolet-Ultrasonic Continuous Treatment of Surfactant Containing Waste Water, Proc. of 64th Natl Meeting,” The Soc. Chem. Engineers, Japan, Nagoya, March 1999, L105.
  19. Y. Suzuki, H. Arakawa, M. Tessyu, T. Kubo, W. Warsito , A. Maezawa, S. Uchida & M. Yano, “Ultrasonic Enhancement on Surfactant Containing Waste Water Treatment Using Ultraviolet Irradiation, Proc. of 64th Natl Meeting,” The Soc. Chem. Engineers, Japan, Nagoya, March 1999, L104.
  20. W. Warsito , M. Ohkawa, N. Kawata, A. Maezawa & S. Uchida, “Phase Distributions and Flow Pattern in Slurry Bubble Column Measured by Ultrasonic Computed Tomography, Proc. of 64th Natl Meeting,” The Soc. Chem. Engineers, Japan, Nagoya, March 1999, S304.
  21. M. Ohkawa, N. Kawata, W. Warsito , A. Maezawa, S. Uchida & S. Okamura, “Application of Ultrasonic Computed Tomography for Measurement of Cross-Sectional Distributions of Gas and Solid Holdups in Slurry Bubble Column,” Proc. of 64th Natl Meeting, The Soc. Chem. Engineers, Japan, Nagoya, March 1999, K125.
  22. Y. Suzuki, H. Arakawa, W. Warsito, A. Maezawa & S. Uchida, “Ultrasonic enhancement of photo-catalytic oxidation of surfactant,” Proc. of International Symposium on Photoenergy (SOLAR’99), Cairo, Egypt, March, 1999.
  23. Y. Suzuki, M. Tessyu, W. Warsito , A. Maezawa, S. Okamura, S. Uchida & M. Yano, “Effect of Aeration on Ultrasonic Degradation of Surfactant Contained in Waste Water,” Proc. of 31st Autumn Symposium, The Soc. Chem. Engineers, Japan, Yonezawa, Sept. 1998, N303.
  24. M. Ohkawa, N. Kawata, W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Analysis on Hydrodynamics of Slurry Bubble Column Using Ultrasonic Computed Tomography, Proc. of 31st Autumn Symposium,” The Soc. Chem. Engineers, Japan, Yonezawa, Sept. 1998, O102.
  25. Y. Suzuki, W. Warsito , A. Maezawa, S. Uchida & M. Yano, “Ultrasonic Degradation of Surfactant Contained in Waste Water,” Proc. of Muroran Meeting, The Soc. Chem. Engineers, Japan, Osaka, August 1998, D214.
  26. Y. Suzuki, M. Yamamoto, W. Warsito , A. Maezawa, S. Okamura, S.Uchida & M. Yano, “Treatment of Surfactant Containing Waste Water Using Ultrasonic Irradiation,” Proc. of 63rd Natl Meeting, The Soc. Chem. Engineers, Japan, Osaka, March 1998, D303.
  27. M. Ohkawa, W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Development of Ultrasonic Computed Tomography for Measuring Gas and Solid Holdup Distribution in Slurry Bubble Column,” Proc. of 63rd Natl Meeting, The Soc. Chem. Engineers, Japan, Osaka, March 1998, P307.
  28. W. Warsito, M. Ohkawa, N. Kawata, A. Maezawa, S. Uchida & S. Okamura., “Development of Ultrasonic Computed Tomography to Measure Cross-Sectional Distributions of Gas and Solid Concentrations in a       Three-Phase Reactor,” Proc. of Joint Int Conf. on Advanced Sci. and Technol. (JICAST ’98), Hamamatsu, Japan, August 1998, pp. 74-77.
  29. W. Warsito, M. Ohkawa, A. Maezawa & S. Uchida, “Flow Structure and Phase Distributions in a Slurry Bubble Column,” Proc. of 3rd Int Conf. on Gas-Liquid-Solid Reactor Engng (GLS ’97), Shonan, Japan, Dec. 1997.
  30. W. Warsito, M. Ohkawa, A. Maezawa, S. Uchida & S. Okamura, “Non-invasive and Simultaneous Measurement of Gas and Solid Holdup Distributions in Slurry Bubble Column Using Ultrasonic Computed Tomography,” Proc. of 4th Japan-Germany Sympo. on Bubble Column, Kyoto, Dec. 1997,247-152.
  31. A. Maezawa, Y. Suzuki, W. Warsito, S. Uchida & S. Okamura, “Surfactant Degradation Induced by Ultrasonic Irradiation, Proc. of 30th Autumn Symposium,” The Soc. Chem. Engineers, Japan, Fukuoka, Sept. 1997, H120.
  32. M. Ohkawa, W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Non-invasive and Simultaneous Measurement of Gas and Solid Holdups in Slurry Bubble Column Using Ultrasonic Technique,” Proc. of 30th Autumn Symposium, The Soc. Chem. Engineers, Japan, Fukuoka, Sept. 1997, G120.
  33. M. Ohkawa, W. Warsito , A. Maezawa, S. Uchida & S. Okamura, “Simultaneous Measurement of Gas and Solid Holdup Distributions in a Slurry Bubble Column Using a Novel Ultrasonic Penetration Technique,” Proc. of 62nd Natl Meeting, The Soc. Chem. Engineers, Japan, Tokyo, March 1997, E108.
  34. W. Warsito , A. Maezawa, S. Uchida & S. Okamura, “Simultaneous Measurement of Gas and Solid Holdups in a Slurry Bubble Column Using a Novel Ultrasonic Penetration Technique,” Proc. of 29th Autumn Symposium, The Soc. Chem. Engineers, Japan, Kyoto, Sept. 1996, H109.
  35. W. Warsito , M. Ono, A. Maezawa, S. Uchida & S. Okamura, “Prediction of Radial Distribution of Solid Concentration Profiles in Slurry Bubble Column Using Bubble Wake and Particle Diffusion Model,” Proc. of 61st Natl Meeting, The Soc. Chem. Engineers, Japan, Nagoya, March 1996, N302.
  36. W. Warsito , A. Maezawa, S. Uchida & S. Okamura, “Measurement of Radial Distribution of Solid Holdup in a Slurry Bubble Column Using Ultrasonic Technique,” Proc. of 61st Natl Meeting, The Soc. Chem. Engineers, Japan, Nagoya, March 1996, N301.
  37. W. Warsito, M. Ohkawa & S. Uchida, “Hydrodynamics of Three-Phase Fluidized-bed Measured by Ultrasonic Penetration Technique,” Proc. Of Regional Sympo. on Chem. Engng, Jakarta, Indonesia, Oct.1996, pp. 1-15-1 -1-15-6.
  38. W. Warsito , A. Maezawa, T. Kazuyori, S. Uchida & S. Okamura, “Measurement of Gas and Two-Solid Holdups in Two-Particle Suspended Bubble Column Using Ultrasonic Method,” Proc. of 28th Autumn Symposium, The Soc. Chem. Engineers, Japan, Sapporo, Sept. 1995, T112.
  39. W. Warsito , A. Maezawa, S. Uchida & S. Okamura, “Radial Distribution Profiles of Solid Concentration in Three-Phase Fluidized-Beds Measured by Ultrasonic Technique,” Proc. of 60th Natl Meeting, The Soc. Chem. Engineers, Japan, Osaka, March 1995, E207.
  40. W. Warsito , A. Maezawa, S. Uchida & S. Okamura, “Effect of Solid Particles on Bubble in Slurry Bubble Column,” Proc. of 27th Autumn Symposium, The Soc. Chem. Engineers, Japan, Tokyo Japan, Sept. 1994, Nagoya, J114.
  41. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Hydrodynamics Analysis in Slurry Bubble Column Using Ultrasonic Technique,” Proc. of 26th Autumn Symposium, The Soc. Chem. Engineers, Japan, Kyoto, Sept. 1993, R304.
  42. W. Warsito, A. Maezawa, S. Uchida & S. Okamura, “Measurements of Gas and Solid Holdups and Liquid Velocity in Gas-Liquid-Solid Dispersion Systems Using Ultrasonic Technique,” Proc. of 25th Autumn Symposium, The Soc. Chem. Engineers, Japan, Tokyo, Japan, Sept. 1992, D104.