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Volume 61, Issue 3
Displaying 1-20 of 20 articles from this issue
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1999 Volume 61 Issue 3 Pages 1
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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1999 Volume 61 Issue 3 Pages 2
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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H. TAKENAGA1999 Volume 61 Issue 3 Pages 3-4
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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Y. TAMADA1999 Volume 61 Issue 3 Pages 6-10
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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M. KOGANEZAWA, I. SHIMADA1999 Volume 61 Issue 3 Pages 10-15
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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Y. MURAKAMI1999 Volume 61 Issue 3 Pages 15-20
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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toward new relationship between neuroethology and roboticsY. KUWANA1999 Volume 61 Issue 3 Pages 21-24
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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A. HIRATA1999 Volume 61 Issue 3 Pages 25-26
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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N. YAMANA1999 Volume 61 Issue 3 Pages 27-28
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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Koichi OHTOMO, Tadashi KISHIMOTO1999 Volume 61 Issue 3 Pages 47-55
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA prediction model of a normal stress acting on a towed rigid wheel was proposed. Model accuracy was discussed with the comparison of the calculated and measured data. Pope's model including a sinkage rate was coupled to the Bekker's stress equation to evaluate its effect. Wheel skid was predicted with an empirical equation obtained from experiment of the towed rigid wheel. A tangential stress which has not been modeled was predicted from the tangential to the normal stress ratio and wheel contact angles. The stress produced by soil rebound under the wheel has not been analyzed. The normal stresses calculated from the model showed the good agreement with the experimental data except the section where the soil rebound occurred.View full abstractDownload PDF (1200K) -
Detection of Concrete Ridge of Rice FieldBingQi CHEN, Seishu TOJO, Kengo WATANABE, Fusakazu AI, B. K. Huang1999 Volume 61 Issue 3 Pages 57-64
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes the detection algorithm of the concrete ridge which have three items, aimed ridge, end ridge and side ridge. Candidate points of the edge of each ridge were detected by the differential calculus processing with remodeled Kirsch operator. Only connect ingredients of ridge line were detected using the simple processing of the labelling and the clustering. If the end of the ridge in the image of the aimed ridge was detected, the clustering operation was done until the end of ridge. The most part of the noises were removed by detecting the position of the ridge line about the end ridge before the clustering operation. After the clustering operation, the ridge lines were easily detected by the Hough transformation. If the end point of the aimed ridge was detected, the ridge line of the end ridge was drawed from the end point of the aimed ridge.View full abstractDownload PDF (6462K) -
Growth Measurement by Neural Network ModelToshiyuki SUZUKI, Haruhiko MURASE, Nobuo HGNAMI1999 Volume 61 Issue 3 Pages 65-71
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of this study is a non-destructive growth measurement of the plug seedlings population using their image information. In this report, a neural network model for the non-destructive measurement of the leaf area and top fresh weight of the cabbage plug seedlings population was developed. The inputs to the neural network were the relative soil coverage and standard deviation of lightness.
The predicted leaf area and top fresh weight of test plug seedlings population based on the neural network model were fitted well with the measured values. Their coefficients of determination R2 were 0.95 and 0.94, respectively. The neural network model give much better result than the soil coverage models reported in the previous report.View full abstractDownload PDF (941K) -
Experiment of Polar Coordinate Manipulator Control in Trellis TrainingMitsuji MONTA, Naoshi KONDO1999 Volume 61 Issue 3 Pages 73-81
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn the part 1 and 2 of this series, aiming at a safety and efficient robot system, a function for degree of danger, simulations for robot control, a sensing system including algorithms to discriminate human worker from background and to detect human motion were reported. In this paper, manipulator control experiments were carried out in the field by using the function for degree of danger and the sensing system. Furthermore, evaluating of working efficiency by simulation were done. From the results, effectiveness of the robot system to work safely and efficiently was confirmed.View full abstractDownload PDF (2931K) -
Application on Sugarcane Harvesting Scheduling ProblemI WAYAN ASTIKA, Akira SASAO, Kenshi SAKAI, Sakae SHIBUSAWA1999 Volume 61 Issue 3 Pages 83-94
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe scheduling algorithm named SFSW (Stochastic Farm Work Scheduling Algorithms Based on Short Range Weather Variation) developed in the previous paper was used to schedule sugarcane harvesting in the sugarcane production system of Ishigaki Island, Okinawa, Japan. Adverse effects of weather variation were transformed into two kinds of cost; cost due to inventory loss and penalty cost due to idle time of the factory. The scheduling consisted of two steps; the first step was to determine the daily amount of harvested canes, and the second step was to decide the fields to be harvested and the allocation of harvesters.
Simulation revealed that SFSW succeeded to incorporate weather factors characterized by lower expected cost compared with those of three other schedules decided heuristically. The advantage of updating the schedule was confirmed by comparing the performance of the original schedule with the daily-updated schedule.View full abstractDownload PDF (1703K) -
Comparison of Results between Soil Mixing Model and Field Tillage TestKazuhiro ONODERA, Takashi KATAOKA, Yoshinobu OTA, Tatsuo HIROMA, Sakae ...1999 Volume 61 Issue 3 Pages 95-103
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe evaluation of soil mixing characteristics after rotary tilling is one of the important factors for crop cultivation. This paper describes the results between the soil mixing model presented in the first report and field tillage tests performed in two types of field, an upland and a paddy field. The model showed a good agreement in the upper and middle soil layers. Furthermore, the model led to a desirable design of a rotary cover which would correspond to be based on the characteristics of backward throwing of the tilled soil by the blades.View full abstractDownload PDF (3593K) -
Wenzhong HU, Eriko YASUNAGA, Koichi AKIMOTO, Toshitaka UCHINO, Kohei N ...1999 Volume 61 Issue 3 Pages 105-110
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper was conducted to research on the respiratory characteristics of fresh Shiitake (Lentinus edodes Sing.) mushroom at 5, 15, 20, 30°C. The results indicated that the inducing condition of anaerobic respiration was mainly controlled by the level of oxygen concentration, unlike the result of cucumber fruit affected by the rate of change in gas concentration. Moreover, it was concluded that the limit of lower oxygen concentration was strongly dependent on temperature. The positive linear correlation was also observed between respiration rate and temperature.View full abstractDownload PDF (888K) -
Kenji IMOU, Takashi KOMAKI, Hiroshi TAKENAGA, Masaru KASHIWAZAKI, Tsug ...1999 Volume 61 Issue 3 Pages 111-117
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA lot of electric energy is consumed for greenhouse cooling in nighttime. In this study, a nighttime cooling system using solar thermal energy was developed. That is a kind of intermittent absorption refrigerating systems. Solar heat is stored as the energy of concentration differentials of the solutions in daytime. The energy is used for cooling at night. The system consists of 3 major components those are a regenerator/radiator, a solution tank and an evaporator/condenser. The regenerator/radiator collects solar heat in daytime, and radiates the absorption heat at night. A modified flat plate solar collector was used for the component. From the results of experiments, the basic operation principle of the developed system was verified.View full abstractDownload PDF (2683K) -
Harvesting Accuracy and Effect on Leaf QualityTeruo HARUZONO1999 Volume 61 Issue 3 Pages 119-125
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA new prototype harvester was operated at different velocities speeds with different varieties of tobacco and in order to determine the harvesting accuracy, the ratio of unharvested leaves to all tobacco leaves were monitored. The analysis of achieved harvesting accuracy showed comparable difference among three speeds (1.6, 2.0 and 2.4km/h). The tests demonstrated that the harvester could be used for five varieties of tobacco although there were some differences in harvesting accuracy among varieties. Operating efficiency demonstrated that the machine could reduce harvesting time by 65.6% compared with conventional harvesting. The experiments were conducted on 6.4 hectares. On sunny days there was little difference between the two methods in terms of quality of harvested leaves. A new leaf binder for mechanically harvested leave for curing were also developed. Mechanical harvesting on rainy days produced leaves that were of labor quality in appearance compared to those harvested manually.View full abstractDownload PDF (4854K) -
Yutaka SASAKI, Tsuguo OKAMOTO, Kenji IMOU, Toru TORII1999 Volume 61 Issue 3 Pages 127-129
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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Sakae SHIBUSAW, Shin-ichi HIRAKO, Atsushi OTOMO, Min-Zan LI1999 Volume 61 Issue 3 Pages 131-133
Published: May 01, 1999
Released on J-STAGE: April 30, 2010
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