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Volume 64, Issue 6
Displaying 1-24 of 24 articles from this issue
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S. HATA2002 Volume 64 Issue 6 Pages 1-2
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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2002 Volume 64 Issue 6 Pages 3
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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2002 Volume 64 Issue 6 Pages 4
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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2002 Volume 64 Issue 6 Pages 5
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 7-10
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 11-17
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 18-21
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 22-25
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 26-30
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 31-34
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 35-41
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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[in Japanese]2002 Volume 64 Issue 6 Pages 42-45
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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Effects of Infrared Radiation on inactivation of Bacillus subtilis spore and Aspergillus niger sporeDaisuke HAMANAKA, Toshitaka UCHINO, Wenzhong HU, Eriko YASUNAGA2002 Volume 64 Issue 6 Pages 69-75
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe spore suspensions of B. subtilis and A. niger were irradiated with infrared ray, and also the dry conditions of these microorganisms were irradiated. It took about 600 seconds to reduce the survival rate of B. subtilis spore in the suspension to 0.1 at 1.0kW, and 700-800 seconds at 0.5kW. Moreover, it took about 40 seconds to sterilize A. niger spore in the suspension at 1.0kW, and 130 seconds at 0.5kW. The 90% reduction times of B. subtilis spore under the dry condition were shortened to 1/10, and A. niger were 1/3 of that in the suspension regardless of electric power.View full abstractDownload PDF (1101K) -
Kimiyasu TAKAHASHI, Masahiro SEKI, Hatsuki NISHIDA2002 Volume 64 Issue 6 Pages 76-81
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSFor the physical control of Apple snail, Pomacea canaliculata (Lamarck), injuring the young rice seedling, we accumulate of foundamental data to develop the technology of decreasing density of the snails by rotary cultivator. The snails exist within 6cm deep in the paddy soil, and overwinter there. Near the farm ditch, along the ridge between paddy fields and around lowlands, a lot of snails is growing. The infant snails with shell heights of 5mm are able to damage direct seeding rice on the date of budding. The effective means in use of rotary cultivator is cultivating at a time with narrow pitch. And it is neccesary to set a net bag on the channel preventing the snail enter the fields.View full abstractDownload PDF (3260K) -
Kohei NAKANO, Shigenori MAEZAWA2002 Volume 64 Issue 6 Pages 82-87
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSOur previous model to predict the respiration rate of young soybean was introduced to the mathematical model for atmospheric change in modified atmosphere packaging (MAP) and its feasibility for design of MAP systems was discussed. Simulated O2 concentrations were closely approximated to experimental data. On the other hand, CO2 concentrations were estimated lower at the higher temperature conditions. It was resulted in the difference of the response of O2 consumption and CO2 production to the gas composition change. But the differences between estimated and measured values at the steady state of the gas composition in MAP were less than 1% at a temperature below 20°C. The model presented in this study is valid for the design of MAP systems for young soybean.View full abstractDownload PDF (923K) -
Formulation of NN Vehicle Model and Design of control Law for contour Line TravelRyo TORISU, HAI Shen, Jun-ichi TAKEDA, Muhammad Ali ASHRAF2002 Volume 64 Issue 6 Pages 88-95
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAn automatic tractor guidance system for contour line travel on sloped terrain has been developed. To actualize this system, four procedures were done. First, a neural network (NN) vehicle model was proposed to obtain relations between the steerage and behavior of tractors on sloped terrain. Second, a navigation planner for contour run is constructed by the use of NN based vehicle model. Third, an optimal control theory is applied to the design of a steering controller. As two variables: lateral displacement and heading angle are important for contour line tracking control, a quadratic-form cost function of the two are minimized by genetic algorithm. Finally, the fourth procedure involves using an installed steering mechanism, sensors and a Total Station, in carrying out autopilot tractor tests on contour line travel. The overall performance of the developed navigation system for the contour line tracking tractor-like robot was successful. Paper 2 will discuss a navigation planner for a rectangular path on sloped terrain.View full abstractDownload PDF (1116K) -
Navigation Planner for Rectangular PathMuhammad Ali ASHRAF, Jun-ichi TAKEDA, Ryo TORISU2002 Volume 64 Issue 6 Pages 96-103
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAn automatic tractor guidance system has been developed to navigate the tractor along the rectangular path on sloped terrain. For this purpose the following steps were made: 1) a coordinate transformation system was designed to determine the tractor position with respect to the rectangular path; 2) a steering controller was also designed where feedback control method was applied for the rectilinear motions along the contour lines, uphill and downhill directions; and a feedforward control method was developed for the quarter turns of the rectangular path; 3) finally the feedback and feedforward control methods were compounded to guide the tractor along the rectangular path; 4) field tests on automatic tractor guidance system were successfully conducted on sloped terrain.View full abstractDownload PDF (1030K) -
Intersection Recognition and Approach-Turning methodEiji MORIMOTO, Masahiko SUGURI, Mikio UMEDA2002 Volume 64 Issue 6 Pages 104-110
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes intersection guidance marker (IGM) recognition and intersection approaching system for autonomous transportation vehicles (ATVs). The IGM recognition method covers with HSI transform, binarization, Hough transformation and coordinate transformation in order to measure the distance between the ATV and the intersection by image processing. The approaching system involves two rotary encoders, which are installed on both sides of crawler for measuring the position and orientation of the ATV. The IGM recognition method can detect intersection with 0.45m maximum error and image processing speed is 8.64Hz. The intersection approach system works with rms 0.063m, 0.33m maximum bias off the desired path, rms 0.096m and maximum error of travel direction was 0.54m.View full abstractDownload PDF (7541K) -
Hong Jin LIU, Kengo WATANABE, Seishu TOJO2002 Volume 64 Issue 6 Pages 111-117
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the present study, milling yield of rice was classified into 5 gradients. Samples were stained using the NMG method, and images were taken using a digital camera. A method using shadowed areas of endosperm, aleurone layer and bean layer to determine the proportional extent of milling was investigated. Furthermore, the relationship between milling yield, results of measurement by near-infrared spectroscopy, appearance, determination of physical properties of the cooked rice and gelation were investigated. The results suggest that milling degree closely correlates with milling yield and is related to palatability, increased whiteness, grain damage and grain color. The correlation between milling degree, taste and degree of whiteness was clarified.View full abstractDownload PDF (2026K) -
Md. Rahidul Alam MONDOL, Akira AKASE2002 Volume 64 Issue 6 Pages 118-127
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe investigated the separating characteristics of the down-flow type vertical rotating screen separator for brown rice separation and compared them with those of the up-flow type. The main results were as follows: (1) In the separator having the cylinder rotating speed of -44rpm and helix rotor speed of -320rpm, the separating performance increases as the feed rate of material is increased up to 30kg/min. (2) In the down-flow separator, the separating performance becomes high when the cylinder rotates in the same direction as the helix rotor, but in the up-flow separator it becomes high in the opposite direction. (3) When the feed rate is varied at 10, 20 and 30kg/min under constant rotating speed of the helix rotor, the highest separating performance is obtained at the cylinder speeds of -100, -75 and -50rpm respectively. (4) Using the above-mentioned results (3), we carried out experiments to control the rotating speed of the cylinder suitable for the feed rate of material. Consequently, the high levels of separating performance were obtained at various feed rates.View full abstractDownload PDF (1286K) -
A Model Experiment for a Plastic House Ventilator Driven by Electricity from Photovoltaic GeneratorsHirofumi SUGIURA, Akira YANO, Kazuo TSUCHIYA, Mitsuo IIMOTO, Akio TAGA ...2002 Volume 64 Issue 6 Pages 128-136
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA prototype of a plastic house ventilation system driven by electricity provided from photovoltaic (PV) generators was assembled. The ventilator opened or shut the side windows of the plastic house according to the temperature in the plastic house. The model system was driven by electricity only from PV during two experimental terms: from 18 September 2000 (9/18) to 10/16 and from 11/5 to 12/3. According to energy balance analysis, more energy was consumed when the side windows were completely open or shut than at any other time. Moreover, the standby power consumption when the side windows were held in the open position was nearly double that at the shut position. The minimal capacities of the PV modules and the batteries to drive the model system stably under the weather conditions during the experimental terms were determined. The values were 18.6W and 15.6Ah during 9/18-10/16, and the values were 17.2W and 11.4Ah during 11/5-12/3, respectively.View full abstractDownload PDF (1158K) -
Yongqiang CHENG, Naoto SHIMIZU, Toshinori KIMURA2002 Volume 64 Issue 6 Pages 137-144
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSViscoelastic tests (stress-strain and stress relaxation tests) were applied to evaluate the texture of tofu. Tofu was made in the laboratory by using different concentrations of soymilk (5%, 6%, 7%, 8% and 9%, w/v) and coagulants, such as glucono-delta-lactone (GDL) and calcium sulfate. The parameters of stress-strain behaviors of GDL-coagulated tofu were higher than that of CaSO4-coagulated tofu at the same soymilk concentration. A 4-element model, composed of 2 Maxwell models, was conformed to fit the stress relaxation curves. The elastic parameters E1, E2 for the 4-element model did not significantly change while viscous parameters η1, η2 and relaxation time τ1, τ2 increased with increasing soymilk concentration. Viscoelastic behaviors of tofu suggested the stronger structures accompanying with the increase of soymilk concentration. It seemed that the stress-strain behavior was involved more with the viscous parameters than the elastic ones. These results showed that viscoelastic tests were effective for texture evaluation of tofu. Using this method, the commercial tofu in a local market of China was analyzed. The results showed that very hard tofu was being distributed in the market of China and it was possible to produce tofu by the production method of kinugoshi tofu (no press tofu) with a texture similar to the commercial tofu in China when using CaSO4 as a coagulant.View full abstractDownload PDF (1121K) -
Adoption of an Optical Sensor and a Load Cell as a Yield MonitorTadashi CHOSA, Kyo KOBAYASHI, Masamichi DAIKOKU, Yoichi SHIBATA, Masaa ...2002 Volume 64 Issue 6 Pages 145-153
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this research is to develop a yield-monitoring system for head-feeding combines. This paper focuses on the use of an optical sensor as a kernel-flow monitor, and a load cell as a grain-weight monitor. Their suitability is discussed.
The change in the output signal of the optical sensor was correlated with the grain flow calculated by continuous whole grain sampling. The optical sensor was useful for measuring sequential grain flow. The output signal of the load cell under conditions of no kernel flow, such as when the combine was turning or stopped, was correlated with the total grain weight inside the tank. The load cell was useful for monitoring total grain weight inside the tank, as a batch measurement.
A hybrid yield-monitoring system that uses an optical sensor and a load cell was devised. This system improved the measurement error. In a trial calculation, the error stabilized at less than 10% for a rate of approximately 80%.View full abstractDownload PDF (3713K) -
Kunio NISHIZAKI, Kazutaka UMETSU, Junichi TAKAHASHI, Junji ADACHI, Sus ...2002 Volume 64 Issue 6 Pages 154-156
Published: November 01, 2002
Released on J-STAGE: April 30, 2010
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