Shikanai Takeshi

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

20264476

Mail Address

E-mail address

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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Agriculture   Regional Agricultural Engineering   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Agriculture   Subtropical Agriculture   Professor  

  • Concurrently   University of the Ryukyus   The United Graduate School of Agricultural Sciences, Kagoshima University   Resources and Environmental Science of Agriculture, Forestry and Fisheries   Professor  

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University 【 display / non-display 】

  • 1983.04
    -
    1987.03

    Kyushu University   Faculty of Agriculture   Agricultural Engineering   Graduated

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Graduate School 【 display / non-display 】

  • 1988.04
    -
    1990.03

    Kyushu University  Graduate School, Division of Agriculture  Agricultural Engineering  Master's Course  Completed

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Academic degree 【 display / non-display 】

  • Kyushu University -  Agricultural Engineering

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External Career 【 display / non-display 】

  • 1990.04
    -
    1994.01

    Yanmar, Research and Development Div. Technical Research Center, Researcher  

  • 1994.01
    -
    1998.05

    University of the Ryukyus, Faculty of Agriculture, Bioproduction, Research Assistants  

  • 1998.06
    -
    2007.03

    University of the Ryukyus, Faculty of Agriculture, Bioproduction, Bioproduction System Engineering, Associate professor  

  • 2007.04
    -
    2009.03

    University of the Ryukyus, Faculty of Agriculture, Bioproduction, Associate Professor  

  • 2009.04
    -
    2020.02

    University of the Ryukyus, Faculty of Agriculture, Department of Regional Agricultural Engineering, Biosystem Engineering, Associate Professor  

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Affiliated academic organizations 【 display / non-display 】

  • 1988.04
    -
    Now
     

    Japanese Society of Agricultural Machinery and Food Engineers 

  • 2000.04
    -
    Now
     

    Japanese Society of Agricultural Informatics 

  • 2000.04
    -
    Now
     

    Japanese Society of Farm Work Research 

  • 1997.04
    -
    Now
     

    American Society of Agricultural and Biological Engineers 

  • 1994.04
    -
    Now
     

    International society for Terrain-Vehicle Systems 

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Research Interests 【 display / non-display 】

  • Agricultural Machinery Systems and Information Technology

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Research Areas 【 display / non-display 】

  • Environmental Science/Agriculture Science / Agricultural environmental engineering and agricultural information engineering

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Research Theme 【 display / non-display 】

  • Development of farm work data base

  • Conputer simuration for farm work flow

  • Agricultural System That Utilize Information Technology for Environmental Protection and Increase of Productivity

  • Traveling Performance of Off-Road Vehicles

  • Development of the green house with wind resistance

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Published Papers 【 display / non-display 】

  • Investigation of the Performance of the Small Disc Cultivator in Sugarcane Cultivation

    Yuya AOYAGI1, Yoshiaki SHINZATO, Daiki KAYANO, Takeshi SHIKANAI1

    JOURNAL OF KYUSHU SOCIETY OF AGRICULTURAL MACHINERY AND FOOD ENGINEERS ( KYUSHU SOCIETY OF AGRICULTURAL MACHINERY AND FOOD ENGINEERS )  74   1 - 6   2024.08

    Type of publication: Research paper (research society, symposium materials, etc.)

    　View Summary

    The introduction of agricultural machinery and farming methods that save working time and fuel costs is important from the perspective of improving the time and economic efficiency of production corporations. The performance of disc and traction type work equipment such as disc cultivators in the introduction of mechanised systems for sugarcane cultivation is not yet understood. In this study, the performance of disc culchivators was investigated in sugarcane cultivation ploughing, and compared with the rotary machines in main conventional mechanised systems, and the potential use of disc culchivators in sugarcane cultivation was discussed. The results suggested the possibility of laboursaving and low-cost use of disc culchivators while achieving the same level of work efficiency.

  • Study on Control Systems to Prevent Tractors Overturning using Modern Control Theory

    Yuya AOYAGI, Kyo MISHIMA, Takeshi SHIKANAI

    JOURNAL OF KYUSHU SOCIETY OF AGRICULTURAL MACHINERY AND FOOD ENGINEERS ( KYUSHU SOCIETY OF AGRICULTURAL MACHINERY AND FOOD ENGINEERS )  74   13 - 18   2024.08

    Type of publication: Research paper (research society, symposium materials, etc.)

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    Overturning agricultural vehicles accounts for the largest proportion of fatal accidents during agricultural work. It is important to suppress the pitching angle when tractors travel on sloping and uneven terrain. In this study, the design of a control system using modern control theory was investigated, and the effects of controlling the pitching angle and maintaining the travelling speed were discussed when the attitude control technology using the drive torque as input. As a result, the peak pitching vibration could be suppressed by decelerating during hill climbing and accelerating during descent under the test conditions. In addition, the possibility of avoiding excessive deceleration to avoid overturning during hill climbing was demonstrated.

  • Measurement of Sugarcane Plant Height with a 3D Model Constructed Using UAV-based RGB Images Captured in the Southern Part of Okinawa Prefecture

    Ryoko Uechi, Takeshi Shikanai, Senlin Guan and Koichiro Fukami

    Agricultural Information Research   32 ( 3 ) 76 - 87   2023 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    Many factors have been studied to forecast the production of sugarcane, including the number of stems, stem length, and stem diameter. Although plant height does not directly indicate stem length, determining the plant height can be helpful in cultivation management owing to the close relationship between the two. It is possible to estimate the height of the plant canopy by creating a three-dimensional (3D) model of a field from images taken by a small unmanned aerial vehicle (UAV) equipped with a camera. However, it is difficult to construct a stable 3D model when a canopy is formed by many structures, as in the case of sugarcane plants, which have many thin stems and leaves. In this study, a stable 3D model was constructed from red-green-blue (RGB) images obtained by a UAV in a sugarcane field in the southern part of the Okinawa Prefecture by combining images taken with a camera angled vertically downward with those taken with a camera mounted at a 30 degrees angle from the nadir. Plant height was measured and estimated during the period between planting and harvesting. The plant height obtained from the 3D model had an error of 7.4%, which is an acceptable level of accuracy for cultivation management, because it provides sufficient information on the lodging conditions of sugarcane. By clarifying the distribution of plant height in the entire field, it was possible to confirm the lodging conditions of sugarcane in the field, which is useful information for planning mechanical harvesting.

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      DOI

  • Size Classification and Grading of Okra Using Deep Learning and Image Processing

    Ayaka Isa, Takeshi Shikanai, Muneshi Mitsuoka, Eizo Taira

    Proceedings of The 10th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB 2022)     2022.11

    Type of publication: Research paper (international conference proceedings)

  • Collecting Farm Work Data Using GNSS and Drive Recorder

    Takeshi Shikanai, Senlin Guan

    Japanese Journal of Farm Work Research ( Japanese Society of Farm Work Research )  55 ( 3 ) 163 - 167   2020.09 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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Books 【 display / non-display 】

  • Hybrid Petri Nets and Metaheuristic Approach to Farm Work Scheduling

    Senlin Guan, Morikazu Nakamura and Takeshi Shikanai ( Part: Allotment Writing ,  Hybrid Petri Nets and Metaheuristic Approach to Farm Work Scheduling )

    Advances in Petri Net Theory and Applications, (Ed.), Sciyo  2010

  • A Methodology for Resource Assignment and Scheduling in Uncertain Environment and its Applications to Farm Work Management

    Senlin Guan, Morikazu Nakamura, Takeshi Shikanai, ( Part: Multiple Authorship )

    その他の出版機関  2009.02

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Other Papers 【 display / non-display 】

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Presentations 【 display / non-display 】

  • Work Analysis of Small Size Sugarcane Harvester Using GPS and On-Board Camera in Okinawa Island

    Kouta Yokaryo, Senlin Guan, Takeshi Shikanai

    The 9th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering  ( Jeju, Korea)  2018.05  -  2018.05 

  • Mathematical Model and Solution for Land-Use Crop Planning with Cooperative Work

    Senlin Guan, Takeshi Shikanai, Morikazu Nakamura, Koichiro Fukami

    , 2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)  (Hamamatsu, Japan)  2017.01  -  2017.01 

  • Machine Learning for Classifying Working State Images Recorded by Digital Tachograph System

    Senlin Guan, Takeshi Shikanai, Morikazu Nakamura

    The 31st International Technical Conference on Circuits/Systems, Computers and Communications Technical Program,  (Naha, Japan)  2016.06  -  2016.06 

  • Analysis of Working Performance of Small and Medium Size Sugarcane Harvesters by Using GPS

    Rimi Ohshiro, Senlin Guan, and Takeshi Shikanai

    The 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB) 2016  (Niigata, Japan)  2016.05  -  2016.05 

  • Development of truss structure greenhouse materials having lower costs and strength against typhoons

    M. Tamaki, T. Shinjyo, T. Shikanai, S. Tamaki,

    XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014): International Symposium on Innovation and New Technologies in Protected Cropping  (Brisbane, Australia)  2015.12  -  2015.12 

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SDGs 【 display / non-display 】

  • 沖縄県本島地域での小規模経営を対象としたサトウキビ栽培の最適化

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