All issues
Volume 62, Issue 1
Displaying 1-19 of 19 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]2000 Volume 62 Issue 1 Pages 1-2
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2356K) -
Munehiro TAKAI2000 Volume 62 Issue 1 Pages 4-7
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (2174K) -
From a view point of Nonlinear DynamicsKenshi KASAI2000 Volume 62 Issue 1 Pages 8-12
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1938K) -
Kunio NISHIZAKI2000 Volume 62 Issue 1 Pages 13-17
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1997K) -
Farm Vehicle traveling Road and Requirements-Visibility of Slow-Moving Vehicle Identification EmblemAkira SASAO2000 Volume 62 Issue 1 Pages 18-21
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1963K) -
Shun-ichi HATA2000 Volume 62 Issue 1 Pages 22-25
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1976K) -
Fumitake ISHIKAWA2000 Volume 62 Issue 1 Pages 26-28
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1537K) -
[in Japanese]2000 Volume 62 Issue 1 Pages 29-30
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1925K) -
Feasibility of Linear Discriminant FunctionHiromichi ITOH, Ritsuya YAMASHITA2000 Volume 62 Issue 1 Pages 55-63
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe objective of the research is to develop an automatic discrimination system for detecting the damaged black soybeans (Tanbaguro). Digital images of the black soybeans were collected through the digital camera. Using image processing techniques, texture features, namely the first or second order statistics and run-length statistics, were calculated. Then a linear discriminant function, which was used for texture feature analysis, discriminated the wrinkle soybean from the whole soybeans with minimum error of 18%.View full abstractDownload PDF (4128K) -
Koichi HASHIGUCHI, Takashi OKAYASU, Seiichiro TSUTSUMI, Masami UENO2000 Volume 62 Issue 1 Pages 64-72
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to analyze the soil-water coupled finite deformation behavior, the FEM program is developed by introducing the extended subloading surface model (unconventional elastoplastic constitutive model) which is capable of describing not only the monotonic but also the cyclic deformation. The validity was verified by comparing FEM results with some triaxial test results. The FEM results for the relationship between the shear strength and the axial strain rate of normally consolidated clay agreed well with test results. Besides, the deformation behavior of the homogeneous triaxial specimen caused by the pore water flow is discussed in detail.View full abstractDownload PDF (1180K) -
Optimization of harvesting sequence and starting dateLiya SUN, Masami UENO, Masaaki OOMINE2000 Volume 62 Issue 1 Pages 73-82
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSome simulations by Genetic Algorithm discussed in the previous paper were carried out in order to optimize the harvesting sequence and starting date of it taking into consideration the characteristics of cropping types. GA solution was regarded as the optimum one by comparison with models derived from empirical considerations and actual conditions of harvesting. GA was effective to solve these problems because of the rapid convergence of solution. The following results were clarified by the characteristics of the optimum solution. It is better to harvest in the order from a matured cane. Considerable economical loss occurs by inadequate harvesting sequence. Fitness value draws a curve with a peak against to the starting date, therefore there is an optimum solution.View full abstractDownload PDF (1500K) -
Takuo KOKURYU, Sakae SHIBUSAWA, Takao MIYASHITA, Akira SASAO2000 Volume 62 Issue 1 Pages 83-88
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis paper described soil bin experiment to confirm increases in lodging resisitance of rice stubbles by furrowing between the crop rows in the Direct Sowing on Moistened Paddy (DSMP) system. Lodging resistance, amount of roots and top growth parameters were measured for test stubble at different spacings to the furrow. Field experiment was also carried out with a broadcasting type sowing machine making furrows to estimate the furrow effects. The soil bin experiment resulted that making furrows enhanced both the bearing capacity of soil and the development of root system, followed by increase of anti-lodging ability. The field experiment also proved the increase of lodging resistance through furrowing.View full abstractDownload PDF (930K) -
Method due to composition of left and right imagesTeruo TAKAHASHI, Shuhuai ZHANG, Hiroshi FUKUCHI, Eiji BEKKI2000 Volume 62 Issue 1 Pages 89-99
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA method is to obtain the color feature, position, and distance of an object in the common visual space of two cameras by judging clearness on composite images at the cross sections of distances on disparity. The mechanical accuracy on distance by the use of an experimental stereo vision system was within 2% at the distance of 1 to 4m. Variance of RGB and their average values of eight directions were used as a clearness indicator of composite images. These results were suitable for the both images of color and depth when the whole area of an object image was selected to compare clearness. An experiment was carried out using red apples in an orchard during harvest as an object for testing this method. The results showed a distance error of 4% or less, which proved that the method is useful for distance measurement of fruit.View full abstractDownload PDF (3077K) -
Development of Software for Determining the Direction of Strawberry (Akihime variety)Masateru NAGATA, Pepito Menguito BATO, Masafumi MITARAI, Qixin CAO, Ta ...2000 Volume 62 Issue 1 Pages 100-110
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe sorting system which was developed previously by us was used to supply the strawberries in the same direction and judge them according to shape and size. However, for automatic sorting system, the computer must be able to judge the strawberry placed at any angle from 0 to 360 degrees. Therefore, a software to determine the correct direction of strawberry at any position was developed. In this study, strawberries of Akihime variety were used to verify the new software which was developed this time.
To test the performance of the direction software, the characteristic features of maximum diameter, height and angle were extracted from the images of class A and B strawberry samples and the standard error and t-test statistical methods for analysis were done. The results showed that the standard error were very small for all the parameters measured. Also, from the t-test analysis, the mean value of parameters extracted in each angle was not different compared to that of the standard 0° position. Hence, the ability of the developed software to determine the correct direction of the strawberry was confirmed.View full abstractDownload PDF (6337K) -
Improvement of the machine and the performance testsTeruo HARUZONO2000 Volume 62 Issue 1 Pages 111-118
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe utility tests of the prototype automatic harvester and curing tools were carried out in flue-cured tabacco producing districts in 1992, 1993 and 1994. The harvester type I was remodeled into type II during the tests to solve mechanical problems and to improve handling utilities. The improved machine was tested to confirm the required power and performance of conveyer units, and harvesting accuracy. As the results, the required power and the harvesting accuracy of the new machine were similar to those of the old one. The shape of resister on the conveyer belts and the gap between roller and belt in the leaf convey units were adjusted to decrease leaf damage.View full abstractDownload PDF (4908K) -
Utility tests in flue-cured tobacco farmsTeruo HARUZONO2000 Volume 62 Issue 1 Pages 119-126
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe utility tests of the prototype automatic harvester and the curing tools were carried out at 75 farms in flue-cured tobacco producing districts in 1992, 1993 and 1994. Harvesting efficiency, rate of leaf damage and operating efficiency were almost the same among each stalk position. Based on labor consumption of conventional methods an economic evaluation of the machine was carried out. Discussing commercial area, the economical turning point between the mechamical harvesting and the conventional harvesting was more than 3.6ha.
The improved type harvester was first introduced to tobacco growers in 1995.View full abstractDownload PDF (3205K) -
Performance for paddyTakao SUGIYAMA, Tomohiko ICHIKAWA, Hiroyuki TAKAHASHI, Yasuyuki HIDAKA ...2000 Volume 62 Issue 1 Pages 127-136
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe studied on harvesting of standing grain in order to develop a new harvesting system for power saving and low cost in grain crops.
In this research, performance and charateristics of stripping header, which was one harvesting system of standing grain, were investigated in paddy.
A stripping header was 2.5m wide and composed of adjustable hood, stripping rotor with comb moves through the crop, stripping the grain from the plants and leaving the straw in the field. Stripped grain and chaff are moved back ward by conveyer and platform auger. At the results of the tests, relationship between rotor speed/working speed ratio or lodged crop harvesting and performance, and energy saving were clearfied.View full abstractDownload PDF (4671K) -
Performance for wheatTakao SUGIYAMA, Tomohiko ICHIKAWA, Hiroyuki TAKAHASHI, Yasuyuki HIDAKA ...2000 Volume 62 Issue 1 Pages 137-145
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSPeformance and characteristics of stripping header for combine harvester were investigated in wheat.
At the results of the tests, the relationship between rotor speed/working speed ratio or lodged crop harvesting and performance, were clearfied.
From the results, the stripping header could be used for power saving in wheat harvesting, and a combine harvester with the stripping header could harvest at 2 to 3 times the speed of a combine harvester with reel header.
And the recutting system for combine harvester with stripping header were studied on.View full abstractDownload PDF (5838K) -
Evaluation of Nitrogen Losses and Yield of Transplanted and Direct-Seeded RiceEulito U. BAUTISTA, Delfin C. SUMINISTRADO, Masayuki KOIKE2000 Volume 62 Issue 1 Pages 146-157
Published: January 01, 2000
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo determine parameters for effective mechanical placement of nitrogen (N) into puddled soil, a study on deep placement devices for prill, briquette, and liquid N was conducted with transplanted and direct-seeded rice. Results showed that placement of any N material with simultaneous soil cover was effective in minimizing floodwater ammoniacal-N losses and ammonia volatilization. Deep placement in transplanted rice at 40-60% less N rate outyielded and doubled the N use efficiency of split broadcast. In direct-seeded rice, agronomic performances of deep placement and split broadcast were similar. Despite of metering performance problems, deep placement showed pronounced effects on rice yield and N use efficiency. Based on these results, an improved system of mechanical deep placement for wetland rice is recommended.View full abstractDownload PDF (3267K)
- |<
- <
- 1
- >
- >|