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Volume 63, Issue 6
Displaying 1-26 of 26 articles from this issue
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A. GONDO2001 Volume 63 Issue 6 Pages 1-2
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
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Hiroyuki SHINOZAKI2001 Volume 63 Issue 6 Pages 4-9
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
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Its Organization and ActivityKyoushirou MIURA2001 Volume 63 Issue 6 Pages 10-15
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
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K. ITO2001 Volume 63 Issue 6 Pages 16-17
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
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H. AKAIKE, H. KAWASAKI2001 Volume 63 Issue 6 Pages 18-19
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
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Leroy GARCIANO, Ryo TORISU, Jun-ichi TAKEDA, Jun YOSHIDA2001 Volume 63 Issue 6 Pages 45-50
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe dynamic behavior of a larger size tractor at higher working speeds was investigated using two types of frequency response tests by conducting a vertical and pitch mode experiment and roll mode experiment. The experiment was conducted by running the tractor with all wheels on the artificial test track and with the right side front and rear wheels of the tractor on the test track. The results of the investigation showed resonance in the frequency of 3.2Hz in the vertical mode of vibration and in the frequency of 4.3-4.8Hz in the pitch mode which were determined in the vertical and pitch mode experiment.
The existence of the roll mode of vibration was estimated to be in the lower frequency range of 0.9-1.7Hz and in the higher frequency range of 5.4-5.6Hz. The subharmonic frequencies that occurred within the speed range of 2.34-3.71m/s indicated the existence of nonlinear vibration characteristics of the tractor.View full abstractDownload PDF (1081K) -
Analysis of Seat and Pedal PositionsJulius Caesar V. SICAT, Masafumi MITARAI, Osamu KINOSHITA, Hirotaka KI ...2001 Volume 63 Issue 6 Pages 51-56
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn analyzing for the best seat height, brake pedal and clutch pedal positions, accessibility tests were initially conducted using commercial tractors, and eventually, using a test rig that was fabricated based on tractor survey data. Operator performance at various seat height and pedal position combinations on the test rig were analyzed.
The results indicated that in as far as accessibility of the pedal pads are concerned, the seat to pedal distance, operator gender, operator height and tractor pedal positions can significantly influence the performance of the operator. Furthermore, the most accessible pedal pads are located±15° from the center of the tractor. These, in combinations with 410mm seat height and 900mm seat back to pedal distance, or 470mm seat height and 800mm seat back to pedal distance, required the least time to depress the clutch and brake pedals.View full abstractDownload PDF (3438K) -
Kimitoshi TANOUE2001 Volume 63 Issue 6 Pages 57-62
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe purpose of this study is to clarify the combustion properties of biogas fuel and to develop a new combustion technique with high efficiency and low emission for internal combustion engine operated by biogas fuel. It has been shown by the results that methane is intrinsically suitable for lean burn technique compared with other hydrocarbons, such as propane. In addition, it has been also found that dilution with CO2 has an effect on increase in turbulent burning velocity of methane mixture compared with the corresponding dilution with N2. Furthermore, hydrogen addition to a methane mixture has been shown to improve the turbulent combustion performance in fuel lean mixture region.View full abstractDownload PDF (999K) -
Milling Power Model and Milling Energy ModelShoji KOIDE, Yoshio NISHIYAMA2001 Volume 63 Issue 6 Pages 63-67
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe milling power and milling energy during abrasive milling were measured under five rotor revolutions (800, 1, 000, 1, 200, 1, 400, 1, 600rpm), by use of a batch type abrasive milling machine. Results indicated that the milling power decreased with milling time. In this paper, the milling power and milling energy with milling time were modeled using the observed data as follows;
Abrasive milling power model;
P=a/1+b⋅exp(k2t)
Abrasive milling energy model;
E=1/k1ln[1+b/1+b⋅exp(k2t)]+k2/k1⋅tView full abstractDownload PDF (787K) -
Shoji KOIDE, Naoya SATTA, Hisayoshi KOFUJITA2001 Volume 63 Issue 6 Pages 68-72
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe feasibility to concentrate L-ascorbic acid (Vitamin C, AsA) from wastewater coming from the immersion process at a potato processing plant by electrodialysis was evaluated. It was found that dissolved AsA could be concentrated electrically, by use of electrodialysis. The characteristics of the raw wastewater, the filtrated solution, and the electrodialyzed solutions were also assessed quantitatively. In the diluted solution after electrodialysis, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total solids (TS) and volatile solids (VS) were reduced by 71.0%, 73.7%, 51.0% and 75.2%, respectively, compared to the raw wastewater. In this study, variation of dissolved AsA concentration in the concentrated solution during electrodialysis under several current densities was analyzed using a mathematical model. The calculated values by the model fit the measured values well.View full abstractDownload PDF (923K) -
Kohei NAKANO, Nobutaka NAKAMURA, Takeo SHIINA, Shigenori MAEZAWA2001 Volume 63 Issue 6 Pages 73-78
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA model was developed to predict the respiration rate of young soybeans stored under differing temperatures and O2 concentrations. Respiration rates were measured at three temperatures (10, 15 and 20°C) and four O2 concentrations (1.5, 4, 9 and 20%). The data obtained showed good fit with the recently proposed Michaelis-Menten type respiration model as a function of O2 concentration. It was confirmed that the temperature dependence of estimated kinetic constant Km and Vmax follow the Arrhenius relationship, we have succeeded in extending this model to describe the effect of temperature on the respiration rate of young soybeans.View full abstractDownload PDF (912K) -
Wenzhong HU, Koichi AKIMOTO, Toshitaka UCHINO, Eriko YASUNAGA, Daisuke ...2001 Volume 63 Issue 6 Pages 79-84
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe changes in the respiration rate of fresh shiitake mushroom under the conditions of initial low oxygen concentration were discussed at 10 and 20°C. The results indicated that the respiration rate of fresh mushroom was suppressed by the decrease of oxygen concentration. Therefore, it was suggested that better keeping quality could be obtained from low oxygen atmosphere at an early stage. Moreover, the effects of oxygen and carbon dioxide concentrations, the elapsed time on the respiration rate in the aerobic respiration period were also investigated by multiple regression analysis. The results demonstrated that the respiration rate of fresh mushroom was markedly affected by oxygen concentration among three factors of oxygen and carbon dioxide concentrations, the elapsed time. It was also shown that the effect of the elapsed time on the respiration rate became greater next to that of oxygen concentration with increase of temperature.View full abstractDownload PDF (1130K) -
Kazunori IWABUCHI, Fumihito MIYATAKE2001 Volume 63 Issue 6 Pages 85-89
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper describes the appropriate microbial culture conditions (agar medium, incubation temperature and incubation time), for estimating the microbial population size of bacteria and actinomycetes in dairy manure compost. A sample of dairy manure compost was prepared in a forced aeration adiabatic reactor. The microbial population sizes of the sample were then measured using the dilution agar-plate method with various culture conditions, to determine the best microbial culture condition. Four different agar mediums were tested at various incubation temperatures ranging from 20 to 70°C at 5°C intervals, to measure the population sizes of both bacteria and actinomycetes. We identified a suitable agar medium, incubation temperature and incubation time for determining the microbial population size of mesophilic and thermophilic bacteria and actinomycetes. Of particular note, we found that the optimum culture conditions for the mesophilic bacteria occurred at about 43°C, higher than temperatures that are widely accepted.View full abstractDownload PDF (793K) -
Nobuyuki SAWAMURA, Masamichi DAIKOKU, Yutaka SASAKI2001 Volume 63 Issue 6 Pages 90-94
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSLarge sized paddy field has been constructed in order to improve fieldwork efficiency of a big vehicle for reducing rice production cost. Various kinds of rice direct broadcasting seeding cultural techniques also have been investigated for the same purpose. However, these techniques might bring a difficulty of the rice crop tendering work by a knapsack engine duster.
This paper presents a tramline traffic system for the seeding and the tendering crop in a heavy clay paddy field. The paths of the vehicles should be fixed with equal interval of 10m to minimize the area trampled in every tendering work using the vehicles. A shape of the tramlines is similar to a drain ditch so that improves the drainage and the irrigation. A vehicle would bog by roughed tram surface through a number of passings on the tramlines. Reinforcement of the tramlines by soil cement was effective for improving maneuverability of the vehicles.View full abstractDownload PDF (904K) -
Performance Tests and Practical StudiesTakashi GOTOH, Mitsuhiro HORIO, Yoh NISHIMURA, Kazunobu HAYASHI, Tomoh ...2001 Volume 63 Issue 6 Pages 95-101
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe coating accuracy and rate of work of an automatic coating machine and a conventional manual coating machine were investigated. Variations of mass of a coated seed in a manual coating machine differed according to each worker's level of skill. Variations of mass of a coated seed, peeling of coating material from a coated seed discharged by the metering device of a seeder and germination rate of coated seeds in a laboratory dish in an automatic coating machine were almost the same as a manual coating machine operated by a skilled worker. Problems for practical use were identified in on-the-spot monitoring tests. As a result of these tests, automatic coating machine was developed and put on the market.View full abstractDownload PDF (3064K) -
Chiyuki TOGASHI, Kazuhiro MATSUMORI, Jun-ichi KAMIDE2001 Volume 63 Issue 6 Pages 102-106
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe size of droplets of vegetable oil spray injected from the injection nozzle plays a significant role in the performance of diesel engines. Now, three kinds of the injection nozzles are used according to the combustion chamber type of the diesel engine in the world: pintle, throttle and hole nozzles. This paper deals with the relationship between the droplets size of the injected spray and the injection nozzle types using two kinds of vegetable oils and the mixture of diesel oil and each of these two different vegetable oils.
The results show that there was a logarithmical relationship between the kinematic viscosity of fuels and the mean size of droplets of the spray injected from each injection nozzle del. The mean size of droplet from the throttle nozzle was smaller than that from the pintle nozzle because the rate injection of the throttle was different from that of the pintle nozzle. The droplet size of the hole nozzle was smallest because of the smallest injection port and the highest injection pressure.View full abstractDownload PDF (884K) -
Development of Measuring Devices for Soil Surface HardnessYoh NISHIMURA, Kazunobu HAYASHI, Takashi GOTOH, Mitsuhiro HORIO, Tomoh ...2001 Volume 63 Issue 6 Pages 107-113
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study was carried out to develop precision direct drill Seeder with controls of seed depth for direct sowing of rice on paddy field. In this paper, the development of two measuring devices for soil surface hardness that effects the seeding accuracy was discussed. The one is a soil surface hardness meter that detects the injection depth of a cone-type sensor from land-level in the range of 0-55mm. The other is a soil surface hardness sensor, constructed with a gage-wheel that follows on the soil surface and a sensor-wheel that varies its injection depth with soil hardness. The angle of these wheels had a strong relation to the soil surface hardness meter.View full abstractDownload PDF (4663K) -
Schematic of a Precision Direct Drill Seeder and Seed Depth ControlYoh NISHIMURA, Kazunobu HAYASHI, Takashi GOTOH, Mitsuhiro HORIO, Tomoh ...2001 Volume 63 Issue 6 Pages 114-121
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study was carried out to develop precision direct drill Seeder with controls of seed depth for direct sowing of rice on paddy field. The developed Seeder mounted on a paddy vehicle consisted of a feeding unit and a furrow opener-closer unit. The furrow opener-closer unit was constructed with a float that follows the soil surface smoothly, a two stage adjustable furrow opener and a seeding depth controller with the soil surface hardness sensor described in Part 1. In order to clear the shape of the soil covering plate and the controlling method of the plate angle, basic rotary soil bin tests were conducted. As a result, the shape of the soil covering plate and the available controlling method of the plate angle was clarified.View full abstractDownload PDF (6788K) -
Performance of Proto-type Seeder, Emergence, Establishment and Yield of Paddy RiceYoh NISHIMURA, Kazunobu HAYASHI, Takashi GOTOH, Mitsuhiro HORIO, Tomoh ...2001 Volume 63 Issue 6 Pages 122-130
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study was carried out to develop precision direct drill Seeder with controls of seed depth for direct sowing of rice on paddy field. This performance will exert influence on stable germination by decreasing inappropriate germination (surface seedling, floating seedling, lodging seedling). The seeding performance of the developed machine and the rice growth process were analyzed in the farmers' and experimental fields located in a total of 14 domestic areas for two years (1997, 1998).
The results showed that the developed machine achieved high performance, such as high accuracy seeding depth control, two-stage depth control with the new furrow-opener and a high rate of work. Therefore the growth process was stable every year.
The developed rice seeder was put on the market in the spring of 2000.View full abstractDownload PDF (1730K) -
Effect of the Structure Regarding Vibrational CharacteristicShozo TAKAHASHI, Yoshiteru MIYABE, Isamu FUKUMOTO, Masayuki KOIKE, Mas ...2001 Volume 63 Issue 6 Pages 131-136
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo clarify the vibrational characteristic of a frame fabricated with portable type tea-plucking machine, the effects of the frame structure regarding natural frequency and vibrational mode were examined utilizing the results of a numerical analysis undertaken by a transfer matrix method. As a result, it could be found that the manipulation for the outside diameters of the main members were most effectively affected to the changes of natural frequencies, and hence the natural frequency tended to increase as the outside diameters increased. It could be expected to reduce the vibration at the grip point by changing the outside diameter of the main members from 22mm to 25mm.View full abstractDownload PDF (1108K) -
Effect for Vibrational Reduction by Additional MassShozo TAKAHASHI, Yoshiteru MIYABE, Masatoshi ABE, Isamu FUKUMOTO, Masa ...2001 Volume 63 Issue 6 Pages 137-142
Published: November 01, 2001
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSFor the purpose of reduction of vibration transmitted to the hand from a portable type tea-plucking machine, this paper showed an approaching way which led to the reduction of vibration at the grip portion by providing additional mass at the free-end of the main frame. Firstly, the effects of the additional mass to the vibration node of cantilever were investigated by using the theoretical analysis. Secondly, the effects of an additional mass to the vibration at the grip point of H-type model were taken into account by refering numerical result derived from the transfer matrix method. As a result, it could be expected to point out the way for reducing the vibration at the grip point providing an additional mass. The effects of putting an additional mass were clearly recognized by indoor experiments for the reduction of vibration in prototype tea-plucking machine.View full abstractDownload PDF (1028K) -
2001 Volume 63 Issue 6 Pages 143b
Published: 2001
Released on J-STAGE: April 30, 2010
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2001 Volume 63 Issue 6 Pages 143d
Published: 2001
Released on J-STAGE: April 30, 2010
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2001 Volume 63 Issue 6 Pages 143e
Published: 2001
Released on J-STAGE: April 30, 2010
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2001 Volume 63 Issue 6 Pages 143a
Published: 2001
Released on J-STAGE: April 30, 2010
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2001 Volume 63 Issue 6 Pages 143c
Published: 2001
Released on J-STAGE: April 30, 2010
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