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Volume 62, Issue 3
Displaying 1-24 of 24 articles from this issue
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2000 Volume 62 Issue 3 Pages 1
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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2000 Volume 62 Issue 3 Pages 2
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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T. FURUKAWA2000 Volume 62 Issue 3 Pages 3-4
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Mikio OGAWA2000 Volume 62 Issue 3 Pages 6-10
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Shigeru OBARA2000 Volume 62 Issue 3 Pages 11-13
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Hiroyuki FUKUDA2000 Volume 62 Issue 3 Pages 14-17
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Shu-huai ZHANG, Takashi KATAOKA2000 Volume 62 Issue 3 Pages 18-21
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Akira AKASE2000 Volume 62 Issue 3 Pages 22-25
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Sadao OMORI2000 Volume 62 Issue 3 Pages 26-29
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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K. SUZUMORI2000 Volume 62 Issue 3 Pages 30-32
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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N. DOSHU2000 Volume 62 Issue 3 Pages 33-34
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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Longitudinal Wave Velocity and Elastic Moduli of Gas-Dispersed MediumTakahisa NISHIZU, Yoshio IKEDA2000 Volume 62 Issue 3 Pages 51-59
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis study aims at the theoretical and experimental investigation into the dependence of sound velocities and elastic moduli on intercellular space gas in fruits and vegetables.
It was proposed that longitudinal wave velocity of gas-dispersed medium could be determined by gas volume fraction and elastic moduli of medium. In this paper, the validity of this theorem was experimentally investigated by gas-dispersed agar gel. Although the experimental results showed that bulk modules was a dominant factor of wave velocity, Young's modulus had little influence on wave velocity. It was also clarified that dispersed gas reduced bulk modulus and thus wave velocity was decreased.View full abstractDownload PDF (3170K) -
Theory and Proof of Seed-coat Cracking and Occurrence of SwellingKeiich INOUE, Kannji OOTSUKA, Mitsuho SUGIMOTO, Noriyuki MURAKAMI, Wen ...2000 Volume 62 Issue 3 Pages 60-67
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSeed-coat cracking of soybeans occurs easily during the process of air drying. In order to determine the relationship between external air temperature/humidity and distortions in seed-coat cracked grains, the rates of seed-coat cracking of soybeans subjected to mono-layer drying were investigated under various air drying conditions of different temperature and humidity combinations, and the critical distortions were estimated. Based on the results, the required temperature and humidity conditions of air passing through deep bed of soybeans for minimizing coat cracking and preventing swelling due to high air temperature were clarified.View full abstractDownload PDF (1226K) -
Koichi HASHIGUCHI, Seiichiro TSUTSUMI, Takashi OKAYASU, Koshiro SAITOH2000 Volume 62 Issue 3 Pages 68-75
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe plastic instability phenomenon exhibiting the bifurcation of deformation mode and the localization of deformation is observed in a large plastic deformation process leading a material to failure. The prediction of this phenomenon is of importance for the development of engineering in practice, e. g. the mechanical design of machinery, civil and architectural structures. In this article the novel elastoplastic constitutive equation is first proposed, which is applicable to the analysis of not only monotonic but also cyclic loading behavior and is capable of describing the inelastic deformation caused by the stress rate tangential to the yield surface. Based on it, the constitutive equation of soils is formulated.View full abstractDownload PDF (1047K) -
Electrical Characteristics of Fish and Selection of High Frequency Freshness IndicesKoro KATO, Morihiko SAKAGUCHI, Yasuyuki OOI, Shin MARUO, Kaoru TOYODA2000 Volume 62 Issue 3 Pages 76-83
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAs one of the rapid and simple evaluation methods instead of the sensory evaluation for fish freshness, we tried to develop an electrical evaluation method using a high frequency range above 10kHz. Material evaluation by frequency characteristics of electrical impedance and its parameter is called impedance spectroscopy. In case of tissue, information of the deterioration such as damage and softening can be obtained by the method. In this paper, we investigated the variation with ice storage time of the frequency characteristics of resistance and reactance and complex impedance trajectories for muscle of red sea bream. As the results, we selected the radius of Cole-Cole circular arc calculated from the high frequency range 10kHz-1MHz, the resistance ratio and the difference of 10kHz and 1MHz, the central frequency of relaxation and peak value of reactance for the freshness indices.View full abstractDownload PDF (1368K) -
Tadashi KISHIMOTO, Koichi OHTOMO, Sung-Chap CHO, Tatsuto TAMARI2000 Volume 62 Issue 3 Pages 84-93
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis research proves the results of the motion analyses of interactions between soil and wheel lug surfaces. Normal and tangential forces acting on the surfaces were measured by small-sized transducers of three-surfaced lug type, and the traction, the motion resistance and the reaction to the dynamic load were calculated with wheel rotational and lug design angles. The results of experiments indicated that (1) the trailing lug side produced the motion resistance and the reaction to the dynamic load, (2) the lug face produced the motion resistance, the traction and the reaction to the dynamic load, and (3) the leading lug side produced the traction and the reaction to the dynamic load. These were in accordance with the results of wheel motion analysis.View full abstractDownload PDF (1441K) -
Analysis of and solution to the correspondence problemTeruo TAKAHASHI, Shu-huai ZHANG, Hiroshi FUKUCHI, Eiji BEKKI2000 Volume 62 Issue 3 Pages 94-102
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA method of image processing that compares colors and compositions at the same half-side of a visual area, which was divided by left and right eye-lines, was described to solve the correspondence problem of binocular stereo vision. It was found that a common cross area in the disparity between left and right images approximately corresponded by comparing the amounts of characteristic colors between the left and right images. The false images appearing in a composite image were restrained by composing on the same half-side of the visual area. This method was attempted to be applied to 15 pairs of apple images in the same order at left and right images, and 12 pairs of images of overlapped apples in photographs taken by two CCD color video cameras in apple orchards. The results were that the correspondence of the images of 90% in the same order was effective and that of the images of 80% in the overlapped ones was effective. The error of distance measurement was about 5% by composing the images at the same half-side of the visual area.View full abstractDownload PDF (7746K) -
Reconstruction of 3-D Stem ShapeYoshinari MORIO, Yoshio IKEDA2000 Volume 62 Issue 3 Pages 103-110
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is necessary to reconstruct a 3-D stem shape for evaluation of a stem curvature quantitatively. A 3-D stem shape was reconstructed using rotary motion of a stem on a rotary table. The rotary motion was expressed by many 2-D stem shapes using many pictures, which were taken from different angles. The 2-D stem was extracted well by the difference on color histogram as well as the shape difference between the stem and the leaf.View full abstractDownload PDF (1206K) -
Min-zan LI, Akira SASAO, Sakae SHIBUSAWA, Kenshi SAKAI2000 Volume 62 Issue 3 Pages 111-120
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSUsing NIR spectroscopic techniques, soil parameters of raw soil samples collected in the maize, forage and paddy fields were estimated. Soil parameters were soil moisture, SOM, NO3-N, EC and pH. NIR spectral variables were original spectral reflectance, the first derivative, the second derivative and the Kubelka-Munk transform. For soil moisture content, a linear regression model was available in a range of below 30%db or 70-110%db, while an exponential model for a wide range of moisture content up to 110%db. SOM content and EC were estimated with a single spectral regression model. NO3-N content was estimated with a mufti-spectral exponential model and pH with a multi-spectral linear model.View full abstractDownload PDF (1394K) -
Specifications of the Threshing Cylinder for Reducing the TorqueHiroyuki TAKAHASHI, Tomohiko ICHIKAWA, Takao SUGIYAMA, Tsuguo SHIBUYA2000 Volume 62 Issue 3 Pages 121-127
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS5 divided areas of the threshing cylinder were made and the threshing torque and threshing performance where the cylinder had various specifications in every each area were predicted by comparison with the standard specification from the result of the indoor test. Several combinations of cylinder specifications were selected where the torque was less consumed within the allowable threshing loss. These specifications have a point in common where the threshing teeth are decreased in the front part of cylinder and the load in this part is made to reduce. And the threshing torque was to reduce more in case that the screw height gradually increased from top to end of the cylinder. The cylinders which had selected by calculation were tested in practical harvesting with the normal range of speed for the actual proof.View full abstractDownload PDF (911K) -
Closed Circulating Air System Including DehumidifierManuel Jose C. REGALADO, Eiji BEKKI2000 Volume 62 Issue 3 Pages 128-139
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo determine the drying characteristics of rough rice in a closed circulating air dehumidification system, thin-layer drying experiments excluding the effect of layer depth were conducted at different combinations of drying air temperature and relative humidity (r. h.). For the limited variety Mutsuhomare used in the experiments, drying to 15% w. b. moisture level proceeded with temperature as low as 10°C, provided r. h. was 60%. Average drying rate between drying span increased with temperature rise and r. h. fall, but the effect of temperature increase was more significant. The drying rates, 1.60-2.90%d.b./h, at 40°C and 40 to 60% r. h. were greater than 0.78-1.70%d.b./h at 30°C and 0.45-0.88%d.b./h at 20°C. The rates at 10°C and 50 to 60% r. h., 0.41-0.50%d.b./h, were higher than those of natural drying, 0.31-0.36%d.b./h. At 10°C, the decrease in r. h. did not significantly affect drying rate. The sum of heavily and lightly fissured grain percentages linearly increased as drying rate rose.View full abstractDownload PDF (1470K) -
Controlled Humidity Air Drying of Soybean Kernels with High-moisture Content Using Circulation DryerMasamichi DAIKOKU, Nobuyuki SAWAMURA, Kyo KOBAYASHI, Tadashi CHOSA, Yu ...2000 Volume 62 Issue 3 Pages 140-148
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSHeated air drying of soybean kernels with high-moisture content using circulation dryer has resulted in physical damage in the form of seadcoat cracks, seadcoat wrinkles and broken kernels, which are caused by the moisture gradient inside the kernel and the circulation of kernels. To prevent soybean from drying damage, a soybean dryer controlling relative humidity of air using a humidifier was newly developed, and the examination of the method of circulating the kernels and controlling the temperature and the humidity of air was carried out. It experimentally appeared that the intermittent circulation of kernels and the drying air, of which relative humidity was gradually decreased from 45% to 30% at constant temperature of 30°C, made the percentage of soybean drying damage less than 5% when soybean kernels had the initial moisture content of more than 20%. In comparison with the conventional heated air drying, the new drying method controlling relative humidity of air provided higher drying speed and lower running cost as well as less soybean drying damage.View full abstractDownload PDF (4847K) -
Development of Prototype Harvester and its PerformanceTomokazu YOSHIDA, Jun KUBOTA, Kunihiko MAEOKA2000 Volume 62 Issue 3 Pages 149-156
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe destination of this research is to develop a harvesting technology for fragile leaf greens, such as spinaches, which don't head up. This paper presents a manufactured prototype harvester and its performance. The prototype harvester is a walking type one harvesting a row of leaf greens. It consists of the digging collector department, conveyance department, storage department and traveling department that is a gate style carrier with 4 wheels. It was able to harvest spinach that grew outdoors with 5 rows seeding in a ridge, each row had 15cm separation to another, at 0.2m/s traveling speed. The damaged leaf ratio, that was measured by the number of leaves and stems damaged in harvesting, was 25% just after harvesting and was 13% after preparation removing incomplete leaves.View full abstractDownload PDF (4296K) -
Hirokatsu SHITO, Nobuki YAMANA2000 Volume 62 Issue 3 Pages 157-159
Published: May 01, 2000
Released on J-STAGE: April 30, 2010
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