Journal of the Society of Agricultural Structures, Japan
Online ISSN : 2186-0122
Print ISSN : 0388-8517
ISSN-L : 0388-8517
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Volume 25, Issue 3
Displaying 1-5 of 5 articles from this issue
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  • Studies on Control Systems of Greenhouse Environment (Part I)
    Extraction of Know-how of Tomato Cultivation in Niigata Prefecture
    Kazuhiro NAKANO, Kazuhiko KURATA, Xiao-Dong LIAN, Hidekazu WATANABE
    1994 Volume 25 Issue 3 Pages 125-132
    Published: December 25, 1994
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.25.125
    JOURNAL FREE ACCESS
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    The hearing investigation about semi-forcing cultivation of tomato was made for 20 farmers in Niigata prefecture. The contents of the investigation were the structure of greenhouse, cultivating system, environmental controller, cultivating condition, and yield or quality of tomato fruit. The linear multiple regression model was made for three dependent variables of yield, cost of heating and quality of fruit. The coefficient of rank correlation was used for the discussion of the effect of cultivating condition. The objects of cultivation of tomato were classified into three target types of yield, cost and quality of fruit. The cultivating know-how was extracted by these three targets.
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  • Studies on the Mixing of Rice (Part2)
    Flow characteristics of Rice Particles in a Twin-shell Mixer
    Shengwu CHANG, Yelian MIAO, Shigeru YOSHIZAKI
    1994 Volume 25 Issue 3 Pages 133-140
    Published: December 25, 1994
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.25.133
    JOURNAL FREE ACCESS
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    The study was aimed to optimize the rice-mixing operation by the dynamic analysis of the mixing process of rice particles in a batch mixer.
    In this paper, the flow characteristics of rice particles in the twin-shell mixer were measured by an image processing technique using CCD video cameras.
    Experiments were conducted to investigate the effects of vessel loading and rotation speed on bed configuration flowing in the twin-shell mixer, which is either slipping, slumping, rolling or cascading mode depending on the rotation angle of vessel.
    Rice particle mixing characteristics were evaluated by the time required to achieve final mixing and the final degree of mixing. The effects of bed behavior on rice particle mixing characteristics were determined, and based on the above, the explanation of vessel loading and vessel rotation speed affecting the mixing characteristics was given.
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  • Effect of Storage Period and Temperature on Some Properties of Potato Starch
    Naomy S. SABINIANO, Ken-ichi ISHIBASHI, Kazunori HIRONAKA, Kazuo YAMAM ...
    1994 Volume 25 Issue 3 Pages 141-146
    Published: December 25, 1994
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.25.141
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    The effect of temperature on the properties of potato starch during storage at 1, 5 and 10°C for 6 months were determined. The Brabender peak viscosity, final viscosity at 92.5°C breakdown, swelling power, solubility and phosphorus content decreased while initial pasting temperature, temperature at peak viscosity and blue value of the starches increased during storage. Phosphorus content was highly correlated with Brabender peak viscosity and breakdown (r=0.92 and 0.82, respectively, p<0.01). Higher rates of decrease in viscosity and phosphorus content occurred at 1 and 10°C during storage.
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  • Simulation Model of Drying System in Solar House
    Mathanee SRIARJ, Seishu TOJO, Kengo WATANABE, Fusakazu AI
    1994 Volume 25 Issue 3 Pages 147-158
    Published: December 25, 1994
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.25.147
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    Heat transfer in a solar house drying system was simulated. A simulation model for the proposed system was developed and its parameters were determined. The simulation uses the analogy between heat transfer in a thermal system and electric current in an electric circuit. The Personal Computer Simulation Program with Integrated Circuit Emphasis (PSPICE) was used to solve the circuit equations and the results were interpreted accordingly. A detailed discussion of the methods for calculating the thermal parameters and transforming them into electrical parameters is presented. Cumulative-time averages of the actual ambient air temperature and solar radiation were used as model inputs. Incorporating a ventilation heat loss system into the model resulted in reasonable estimates of exhaust air temperature.
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  • A Shortish View of the Latest Greenhouse Production in Korea
    Takashi TAKEZONO
    1994 Volume 25 Issue 3 Pages 159-163
    Published: December 25, 1994
    Released on J-STAGE: September 05, 2011
    DOIhttps://doi.org/10.11449/sasj1971.25.159
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    [in Japanese]
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