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• Studies on landslides

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Global Optimization of Cultivar Trait Parameters in the Simulation of Sugarcane Phenology Using Gaussian Process Emulation

  W B M A C Bandara, Kazuhito Sakai, Tamotsu Nakandakari, Preecha Kapetch, Mitsumasa Anan, Shinya Nakamura, Himasha Rathnappriya

  Agronomy   11 ( 7 ) 1379   2021.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Development of a Rapid Evaluation Method for Cane Deterioration Using Near-infrared Spectroscopy

    82 ( 4 ) 354 - 361   2020.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

• Development of sugarcane and trash identification system in sugar production using hyperspectral imaging

  Kittipon Aparatana, Khwantri Saengprachatanarug, Yoshinari Izumikawa, Shinya Nakamura, Eizo Taira

  Journal of Near Infrared Spectroscopy ( SAGE Publications )  28 ( 3 ) 133 - 139   2020.06 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  Classification and differentiation of clean sugarcane from trash (green sugarcane leaf, dry sugarcane leaf, stone, and soil) are important for the sugar payment system at a sugar mill. Currently, the methods used to do this are manual and subjective. Therefore, this study is aimed at accurately differentiating clean sugarcane from trash by using hyperspectral imaging with multivariate analyses. Samples containing sugarcane billets and trash mixed in a ratio of 18:38 were analyzed in this study. The reflectance data of the samples were analyzed in the wavelength range of 400–1000 nm via principal component analysis (PCA). The PCA model was capable of identifying all of the clean sugarcane and trash samples. The spectral loadings of the PCA model show that the sugarcane and trash samples are easily identifiable based on the color (visible light) of each class, water absorption (approximately 970 nm), and chlorophyll absorption (approximately 680 nm). Based on the characteristic wavelengths of the PCA loading peaks, over 90% of the sugarcane and trash samples were differentiated using a multiple linear regression model. Sugarcane and trash are classified by using partial least-squares discriminant analysis and support vector machine models. For all wavelengths, the classification rate is 92.9% and 98.2%, respectively. This shows that sugarcane and trash can be accurately classified and differentiated by using hyperspectral imaging and multivariate analyses.

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• Practical Use of Bioremediation Methods for Petroleum-contaminated Kunigami-maji Soil

  NAKANO Takuji, NAKAMURA Shinya, MATSUMURA Ayako, TAKAHATA Yoh, SAKIHAMA Hideaki, OSHIRO Hideki, KOUCHI Yusaku, HIRATA Eiji

  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering ( The Japanese Society of Irrigation, Drainage and Rural Engineering )  88 ( 1 ) I_11 - I_20   2020 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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  <p>Field demonstration tests of the bio-pile and land-farming purification methods for remediating petroleum contamination were performed using the Kunigami-maji soil which broadly exposed on surface of the northern half of Okinawa Island. These methods involve the addition of phosphorus and nitrogen compounds or Ryukyu limestone particles to petroleum-contaminated soil. Both methods were found to be effective. The addition of Ryukyu limestone particles shortened the time needed for Total Petroleum Hydrocarbons (TPH) degradation to begin. Land-farming purification with no artificial air supply proved effective for the remediation of petroleum-contaminated Kunigami-maji soil. The lowered water content and pH neutralization may encourage the activation of petroleum-degrading microbes. In practical use, the relationship between petroleum odor and TPH concentration should be investigated with a pilot test on site. This pilot test determines the required period for purification from the TPH removal rate. The field demonstration tests discussed in this study give reference data gathered with nourishment and different of purification-promoting mthods.</p>

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• 連続流入間欠ばっ気活性汚泥方式の農業集落排水施設におけるばっ気槽管理とBOD除去性能に関する研究

  李 雨桐, 中野 拓治, 中村 真也, 山岡 賢, 阿部 真己

  農業農村工学会論文集 ( 公益社団法人 農業農村工学会 )  87 ( 1 ) I_61 - I_71   2019

  Type of publication: Research paper (scientific journal)

  　View Summary

  <p>連続流入間欠ばっ気活性汚泥方式の農業集落排水施設のBOD除去性能確保に関して, ばっ気槽1室のばっ気終了時のORP管理範囲100～125mVを明らかにするとともに, ばっ気装置散気方式, ばっ気強度, ばっ気時間等によるDO挙動特性とBOD除去性能確保に必要なばっ気終了時のDO濃度を把握した．総括酸素移動容量係数（<i>K_La</i>）にはばっ気槽の活性汚泥粘度が関与しており, ばっ気強度, 水温, MLSSを説明変数とする重回帰式から推定できることが確認された．BOD除去速度恒数はばっ気強度, ばっ気時間, 及び槽内水温を説明変数とする重回帰式から推定できることが示唆された．ばっ気強度（0.03 m³∙m^-3∙mim^-1）とばっ気時間（30min）を組合わせたばっ気槽の運転操作を通じて, 少ないばっ気空気量で高いBOD除去性能を得るなど農業集落排水施設の運転管理効率化が図られることが示された．</p>

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Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Integrated IoT platform designed for field monitoring and environmental control

  MIYAMOTO Hideki, NAKAMURA Shinya, HIRASHIMA Yuta, OYAMA Masami, OHKITA Shoji

  Journal of the Japanese Society of Soil Physics ( Japanese Society of Soil Physics )  148 ( 0 ) 39 - 43   2021  [Refereed]

   

  DOI CiNii Research

• Consciousness and behavior for typhoon events and related phenomena in Okinawa, Japan : A resident consciousness survey

  Saito Sayaka, Nakamura Shinya

    65 ( 65 ) 19 - 82   2018.12

   

• Landslide stability analysis utilizing shear strength of slip surface soil:Asato and Tyunjun landslides, Okinawa, Japan

  Kimura, S., Gibo, S., Nakamura, S. and Vithana, S. B.

  Proceedings of International Conference on Advances in Analysis, Modeling & Design 2010 ( ASCE )    1246 - 1254   2010.02  [Refereed]

   

• Application of recovered strength in stability analysis of reactivated landslide, Xuechengzhen, China

  Nakamura, S., Gibo, S., Yasumoto, J., Kimura, S. and Vithana, S. B.

  Proceedings of International Conference on Advances in Analysis, Modeling & Design 2010 ( ASCE )    3149 - 3154   2010.02  [Refereed]

   

• Influence of laboratory-created OCR on large deformation shear strength: ring shear behaviour of two types of landslide slip surface soil

  Vithana, S. B., Gibo, S., Nakamura, S. and Kimura, S.

  Proceedings of International Conference on Advances in Analysis, Modeling & Design 2010 ( ASCE )    3165 - 3174   2010.02  [Refereed]

   

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Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Slip surface generated layers of tephra landslides triggered by the 2016 Kumamoto Earthquake

  2019.08  -  2019.08 

• Deformation properties of undisturbed volcanic soils sampled from Takanodai landslides which were triggered by the 2016 Kumamoto Earthquake

  2019.08  -  2019.08 

• Fundamental evaluation for making simulated sea bed floc

  2019.05  -  2019.05 

• 火山灰土斜面の土壌水分および土壌雨量指数

  牧野弘樹, 平嶋雄太, 中村真也, 宮本英揮

  土壌の物理性  2018.03  -  2018.03 

• 分光分析法を併用した製糖工程サンプルの品質測定法の開発

  泉川良成, 宇良浩之進, 平良英三, 中村真也

  農業環境工学関連学会合同大会講演要旨集(CD-ROM)  2018  -  2018 

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Academic Awards 【 display / non-display 】

Academic Awards 【 display / non-display 】

• E. B. Burwell Jr. Award, Geological Society of America

  2012.11.05   Geological Society of America  

• Incentive Award, The Japan Landslide Society

  2004.09.01   The Japan Landslide Society  

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Landslide risk characterization using integrated wireless sensor network system for point and area-averaged measurements

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2020.04  -  2023.03 

  Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

• Innovative Landslide Warning System for New Evolution of Disaster Mitigation Science

  Challenging research (sprout)

  Project Year: 2017.06  -  2019.03 

  Investigator(s): MIYAMOTO HIDEKI 

  Direct: 4,900,000 (YEN)  Overheads: 6,370,000 (YEN)  Total: 1,470,000 (YEN)

  　View Summary

  Cosmic-ray soil moisture observing system (COSMOS), a method of measuring cosmic-ray neutrons (φ) near soil surface, was installed on a volcanic ash soil slope and examined to establish an innovative landslide warning system. Although the determination of near-surface soil moisture content (θ) based on φ-value was difficult due to the heterogeneity and uncertainty of water balance within sensing slope area, response of φ to soil water index (SWI) and/or θ was observed during the rainy season. We believe that the COSMOS presented here would be a unique method to monitor near surface soil moisture content of whole slope area if compatible soil moisture model considering the growth of plant communities and 3-dimentional topographic data are proposed.

• Study on Risk Evaluation and Growth of Farm Crops by the Irrigation of Rural Sewerage Treatment Water and Digested Slurry

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2016.04  -  2019.03 

  Investigator(s): NAKANO Takuji 

  Direct: 3,600,000 (YEN)  Overheads: 4,680,000 (YEN)  Total: 1,080,000 (YEN)

  　View Summary

  It was lowly possible for the treatment water of rural sewerage facilities to exert adverse influences including nourishment inhibition of root upon the crops. It was clear that the treated water gave good effect to crops without damaging the growth of the crops. Among elements contained in the treated water, it is nitrogen and boron to be more likely to make good use. It is important that effective use be made of these element effects on irrigation. It was found that BOD and SS in treated water of submerged biological filters were assumed to depend on influent concentration and aeration intensity of contact aeration tank. It was considered that treated water in anaerobic and aerobic filter tanks was suitable for the irrigation use than treated water in sedimentation storage tank and aerobic filter. It was suggested that the operation in aeration intensity and MLSS of aeration tank was importance to use treated water of intermittent aerobic suspended-growth processes for irrigation.

• Grant-in-Aid for Young Scientists(B)

  Project Year: 2010  -  2011 

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2001  -  2002 

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SDGs 【 display / non-display 】

SDGs 【 display / non-display 】