All Stories

  1. Super Typhoon vs. Earthquake as Driving Force of Forest Succession in a Subtropical Tectonically Active Region

    Article • Forests, May 2026, MDPI AG

    Ryoichi DOI

  2. Behavior of Cool and Hot/Warm Air Plumes in Tokyo Revealed by Artificial Intelligence

    Article • Earth Systems and Environment, July 2024, Springer Science + Business Media

    Ryoichi DOI

  3. Are New Residential Areas Cooler than Older Ones?

    Article • Emerging Science Journal, September 2022, Italian Journal of Science and Engineering

    Ryoichi DOI

  4. Hue‐shifting for accurate and precise quantification of biochemical substances using diagnostic test strips

    Article • Coloration Technology, May 2021, Wiley

    Ryoichi DOI

  5. Assessing the reforestation effects of plantation plots in the Thai savanna based on 45 cm resolution true-color images and machine learning

    Article • Environmental Research Letters, December 2020, Institute of Physics Publishing

    Ryoichi DOI

  6. Maximizing the Accuracy of Continuous Quantification Measures Using Discrete PackTest Products with Deep Learning and Pseudocolor Imaging

    Article • Journal of Analytical Methods in Chemistry, April 2019, Hindawi Publishing Corporation

    Ryoichi DOI

  7. Synergistic Effects of Pseudocolor Imaging, Differentiation, and Square and Logarithmic Conversion on Accuracy of Quantification of Chemical Characteristics Using Test Strips and Similar Products

    Article • Analytical Letters, January 2019, Taylor & Francis

    Ryoichi DOI

  8. Quasi-Real-Time Monitoring of a Citrus Field in Nabeul and Joumine Dam in Tunisia

    Article • Journal of Sustainable Watershed Science and Management, June 2017, Atlas Publishing, LP

    Ryoichi DOI

  9. Feasible and effective image processing

    Article • January 2016, De Gruyter

    Ryoichi DOI

  10. Detection of Cassava Leaves in Multi-Temporally Acquired Digital Images of a Cassava Field Under Different Brightness Levels by Simultaneous Binarization of the Images Based on Indices of Redness/Greenness

    Article • Modern Applied Science, August 2014, Canadian Center of Science and Education

    Ryoichi DOI

  11. Red-and-green-based pseudo-RGB color models for the comparison of digital images acquired under different brightness levels

    Article • Journal of Modern Optics, July 2014, Taylor & Francis

    Ryoichi DOI

  12. Precise micromolar-level glucose determination using a glucose test strip for quick and approximate millimolar-level estimation

    Article • Analytical Methods, January 2014, Royal Society of Chemistry

    Ryoichi DOI

  13. Pixel Color Clustering of Multi-Temporally Acquired Digital Photographs of a Rice Canopy by Luminosity-Normalization and Pseudo-Red-Green-Blue Color Imaging

    Article • The Scientific World JOURNAL, January 2014, Hindawi Publishing Corporation

    Dr. Budi Indra Setiawan, Professor Budi Indra Setiawan, Ryoichi DOI

  14. From Maximization to Optimization: A Paradigm Shift in Rice Production in Thailand to Improve Overall Quality of Life of Stakeholders

    Article • The Scientific World JOURNAL, January 2014, Hindawi Publishing Corporation

    Ryoichi DOI

  15. Feasibility of system of rice intensification practices in natural and socioeconomic contexts in Thailand

    Article • International Journal of Sustainable Development & World Ecology, June 2013, Taylor & Francis

    Ryoichi DOI

  16. Slow restoration of soil microbial functions in an Acacia plantation established on degraded land in Thailand

    Article • International Journal of Environmental Science and Technology, February 2013, Springer Science + Business Media

    Ryoichi DOI

  17. Discriminating crop and other canopies by overlapping binary image layers

    Article • Optical Engineering, January 2013, SPIE

    Ryoichi DOI

  18. Simple luminosity normalization of greenness, yellowness and redness/greenness for comparison of leaf spectral profiles in multi-temporally acquired remote sensing images

    Article • Journal of Biosciences, August 2012, Springer Science + Business Media

    Ryoichi DOI

  19. Estimating Crop Coefficient in Intermittent Irrigation Paddy Fields Using Excel Solver

    Article • Rice Science, June 2012, Elsevier

    Dr. Budi Indra Setiawan, Professor Budi Indra Setiawan, Ryoichi DOI

  20. Quantification of leaf greenness and leaf spectral profile in plant diagnosis using an optical scanner

    Article • Ciência e Agrotecnologia, June 2012, FapUNIFESP (SciELO)

    Ryoichi DOI

  21. Estimation of Water Balance Components in Paddy Fields under Non-Flooded Irrigation Regimes by using Excel Solver

    Article • Journal of Agronomy, February 2012, Science Alert

    Dr. Budi Indra Setiawan, Professor Budi Indra Setiawan, Ryoichi DOI

  22. Antibiotic resistance profiles of soil bacterial communities over a land degradation gradient

    Article • Community Ecology, December 2009, Akademiai Kiado

    Ryoichi DOI

  23. Semiquantitative color profiling of soils over a land degradation gradient in Sakaerat, Thailand

    Article • Environmental Monitoring and Assessment, November 2009, Springer Science + Business Media

    Ryoichi DOI

  24. Correlations between soil microbial and physicochemical variations in a rice paddy: implications for assessing soil health

    Article • Journal of Biosciences, November 2009, Springer Science + Business Media

    Ryoichi DOI

  25. Community-level physiological profiling in monitoring rehabilitative effects of Acacia auriculiformis plantation on degraded land in Sakaerat, Thailand

    Article • Silva Fennica, January 2009, Finnish Society of Forest Science

    Ryoichi DOI

  26. Effects of air-drying soils on discriminating the soils with community-level physiological profiling

    Article • The Journal of General and Applied Microbiology, January 2005, Microbiology Research Foundation

    Ryoichi DOI

  27. Principal components derived from soil physicochemical data explained a land degradation gradient, and suggested the applicability of new indexes for estimation of soil productivity in the Sakaerat Environmental Research Station, Thailand

    Article • International Journal of Sustainable Development & World Ecology, September 2004, Taylor & Francis

    Ryoichi DOI

  28. Changes in soil bacterial community profiles associated with deforestation in the Sakaerat Environmental Research Station, Thailand: comparisons between soils of the original forest and bare ground

    Article • Tropics, January 2004, The Japan Society of Tropical Ecology

    Ryoichi DOI

  29. Application of the antibiotic disk diffusion method to multivariate profiling of soil bacterial community: comparing the power to discriminate different soils and dimension of the discrimination with that of the Biolog method

    Article • Brazilian Journal of Microbiology, December 2003, FapUNIFESP (SciELO)

    Ryoichi DOI

  30. Soil environmental factors relating to diversity of culturable soil bacterial communities in the Sakaerat Environmental Research Station, Thailand

    Article • Tropics, January 2003, The Japan Society of Tropical Ecology

    Ryoichi DOI

  31. Increase in the Competitive Nodulation Ability of Bradyrhizobium japonicum Strains Grown in Purified Water.

    Article • Microbes and Environments, January 1996, Japanese Society of Microbial Ecology

    Ryoichi DOI

  32. Isolation of transposon Tn5-induced hydrophobic mutants of aBradyrhizohium japonicumstrain with improved competitive nodulation abilities

    Article • Soil Science & Plant Nutrition, September 1992, Taylor & Francis

    Ryoichi DOI

  33. Changes in Antibiotic Resistance Profile of Soil Bacterial Community in Association with Land Degradation

    Article • Springer Science + Business Media

    Ryoichi DOI