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Volume 37 (2006)
- Issue 4 Pages 173-
- Issue 3 Pages 107-
- Issue 2 Pages 51-
- Issue 1 Pages 3-
Volume 37, Issue 3
Displaying 1-6 of 6 articles from this issue
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Prediction of the project outcomes based on a market capacity modelTatsuya KOYAMA, Tetsuya ARAKI, Yasuyuki SAGARA2006 Volume 37 Issue 3 Pages 107-113
Published: December 25, 2006
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSA ‘market capacity model’ has been proposed to predict maximum limits of the amount of incoming products per unit area in Kramat Jati Central Wholesale Market (Pasar Induk Kramat Jati) in Jakarta, Indonesia. The model calculation was based on the standardized unit area of the outlets in the market. The model was applied to the average amount of dairy incoming products to estimate minimum limits of the area for each product in the market, and then the results indicated that the minimum area of the market should be 20% larger than the one in 2003 to solve the overstocks of the products in the market's passages.
The model calculation also demonstrated that the market capacity could be 15% larger than that in 2003, and could be 50% larger if incoming products were overstocked in all the passages of the market. However, it would be difficult for the market to provide sufficient areas for sales of fresh produce if the number of wholesalers in the market becomes almost the double after the completion of the project, as planned by the market's authority. Therefore, the supply chains should be radically improved to attain the market's rationalization in Jakarta, including the abolishment of the regulation related to the status of the market as the only central wholesale market.View full abstractDownload PDF (841K) -
Three types of problem-solving approaches for solid waste management in urban areasTatsuya KOYAMA, Tetsuya ARAKI, Yasuyuki SAGARA2006 Volume 37 Issue 3 Pages 115-122
Published: December 25, 2006
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSSolid waste disposal systems in metropolitan Jakarta as well as in Kramat Jati central wholesale market, have been analyzed, and then three types of problem-solving approaches have been proposed to manage the issues of the systems in the long run; consensus-building, top-down and bottom-up. The total amount of the solid waste from 153 fresh produce markets in Jakarta was 1, 034m3/day, which corresponds to approximately 4% of the gross volume of the solid waste in Jakarta. The central market disposed 199m3/day of the solid waste, which was not significantly affected by the total amount of incoming fresh produce to the market.
Furthermore, consensus-building approaches would be inevitably required to place a political field that all stakeholders related to solid waste disposal projects might be involved in toward some agreements among all of them. In particular, the third party such as environmental NGOs would be expected to bridge the gaps between administrative officers and inhabitants who live in any sites the projects are planned. Long-term challenges of the consensus-building are how they can determine the alternative locations for the terminal of solid waste disposal, and how they can implement waste-reducing policies and activities both inside the market and in other urban areas.View full abstractDownload PDF (1207K) -
Pisit MANEECHOT, Seishu TOJO, Kengo WATANABE2006 Volume 37 Issue 3 Pages 123-132
Published: December 25, 2006
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSFar Infrared Radiation (FIR) technology is widely used in the automotive industry to cure painted finishes during manufacturing. FIR drying is used not only in manufacturing but also in agricultural processing such as rice drying. At the present time, FIR drying technology has rarely been used for fruits and vegetables except in research laboratories. In this study, FIR drying and hot air convection drying were compared with respect to energy consumption and time requirement. The internal changes of the agricultural product were also observed during the FIR drying process.
A Computed Tomographic (CT) scanner was employed for the observation of the tested material, carrot, and was used to analyze the structural deformation and the internal moisture distribution of the test material. CT data and the hardness of the sample were recorded at regular intervals during the drying experiment.
For 200, 400 and 600W FIR drying, the maximum drying rates were 173, 459 and 724%d.b./hr respectively, and the required drying times were 26, 12 and 4.5 hours, respectively. The structure of the carrot sample shrank in accordance with the reduction of moisture content in 200W FIR drying as well as in hot air drying, whereas in 400W and 600W FIR drying the sample was dried without so much deformation.View full abstractDownload PDF (1856K) -
Atsunori TAKIMOTO, Masanori KOIKE, Jun-ichi TAKAHASHI, Kazutaka UMETSU2006 Volume 37 Issue 3 Pages 133-138
Published: December 25, 2006
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe aim of the study was to clear the effect of inactivation of Verticillium dahliae and Fusarium oxyporum f. sp. melonis of crops pathogenic fungi under methophilic (35°C) and thermophilic (55°C) temperatures using batchwise anaerobic digesters. The time required for a 90% reduction of viable counts of a population of microorganisms or a decrease by log10 (T90) of Verticillium dahliae was 7.7 days at 35°C and 0.6 days at 55°C, respectively. The T90 value of Fusarium oxyporum f. sp. melonis was 0.5 days at 35°C. However, Fusarium oxyporum f. sp. melonis could not be detected after 15 minutes at 55°C. As a result, it was clear that thermophilic digestion was more effective in inactivating Verticillium dahliae and Fusarium oxyporum f. sp. melonis than methophilic digestion.View full abstractDownload PDF (649K) -
Mitsuhiko KATAHIRA, Hiroshi SHIMADA2006 Volume 37 Issue 3 Pages 139-144
Published: December 25, 2006
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe sorting rate of green soy bean pods has remained low because the work generally has to be done by hand. Therefore, producers have expressed interest in a grading machine. In the present study, we investigated whole surface image capture technology of green soy bean pods and developed an experimental image capture machine. The bean pods were dropped from a conveyor belt and photographed in mid-air before two mirrors set at a 120 degree angle to one another, allowing the camera to view the entire surface of each bean pod. Moreover, the bean pods always fell at an incline, and a posture stability board made them parallel with the direction of their fall. In trial tests, sorting accuracy for the image capture machine was 79 percent.View full abstractDownload PDF (5492K) -
T. HISHINUMA, S. HOSHIBA, H. KATO, S. MORITA, A. IKEGUCHI2006 Volume 37 Issue 3 Pages 145-152
Published: December 25, 2006
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe purpose of this study is to reveal the effective distance of manure utilization from the energetic point of view. And it was calculated that the comparing consumptions of fossil energy for manure utilization (composting, transportation and spreading) and chemical fertilizer utilization (production, transportation and spreading) at the case of supplying N, P2O5 and K2O for the land equally.
And the evaluated manure utilization system was compost depot at the about 100 head dairy farm for case study.
The fossil energy consumption was 159GJ at the manure treatment without transportation. The energetic value of chemical fertilizer (N, P2O5 and K2O) at the composted manure was 475GJ. The effective distance for manure utilization was calculated about 20km. It was indicated the manure utilization was environmental friendly from the energetic point at the transport distance less than 20km.
Therefore, this study indicated the limitation of the transport distance of the compost utilization. And it revealed the availability of effective distance for evaluation of compost utilization from the energetic point.View full abstractDownload PDF (832K)
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