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Volume 19 (1988 - 198･･･
- Issue 3 Pages 147-
- Issue 2 Pages 67-
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Volume 19, Issue 3
Displaying 1-5 of 5 articles from this issue
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Concernning Research for the Need of Biomass Energy Utilization Technique in the Local Community and Problem on the IntroductionOritaro ENDO, Takaaki MAEKAWA, Shingo YAMAZAWA, Kazuhiko KURATA, Manab ...1989 Volume 19 Issue 3 Pages 147-154
Published: March 20, 1989
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe method of energy conversion of biomass which has been abolished in the agricultural production and the management of forest is foreseen to give a great influence on the structure of local agricultural production. The establishment of the optimal method adaptable to rural community as the systems upon the foregone scientific knowledge to the biomass energy production and the plan for utilization instruments will be more expected.
The study was tried from the aspects on arrangement of articles to investigate at the stage of basical planning such as progress of arrangement of the problems on the community to have introduced the systems of biomass energy conversion and agricultural association to have attained the introduction, main factor which became the promotive force to introduction and others.
In result, there is a lot of biomass standing crop in the local community and there are many demands to converse the energy and utilize it, the potential inclination to introduction of new technique is enough recognized, but it can be considered that the state to introduce actually is not attained by the deficiency of information for new technique and the checking factor of economy.View full abstractDownload PDF (943K) -
Development of Decision Support Systems for planning of Biomass UtilizationKazuhiro NAKANO, Kazuhiko KURATA, Oritaro ENDO, Manabu SAKAI, Hideo KA ...1989 Volume 19 Issue 3 Pages 155-163
Published: March 20, 1989
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn order to select suitable bio-energy conversion technique for agricultural purposes, decision support systems based on cost analysis and the relation of supply and demand have been developed. Using these systems it is possible to display and analyze construction cost or energy cost required for the use of various methods of bio-energy conversion to meet a given demand and thereby, to select the most economical energy conversion technique.
Case studies were done to test the effectiveness of these systems in decision making. First study showed that more suppliers or utilization of compost would be necessary for recycling the agricultural wates. Second study showed that the cost for the use of methane fermentation technique to supply heat energy ranged from low to high depending on the type of demand. Third study showed that the use of methane gas electric generator to supply electric energy to the beef barn was economically feasible. It was therefore, evident that the developed systems can be used to support decision while selecting bio-energy conversion technique to meet the social needs.View full abstractDownload PDF (1177K) -
Shingo MIYAMOTO, Tohru SHIGA, Sadato ISHIBASHI1989 Volume 19 Issue 3 Pages 165-172
Published: March 20, 1989
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSFor nondestructive internal quality measurement, the shock, sweep and random vibration methods are in general use. In this paper, the effects which the differences in fundamental terms such as vibrating and detecting point had on the transfer characteristics, and points of the differences and the sameness in the transfer characteristics obtained by the each method were investigated by the power spectrum density function and frequency response function.
1. The power spectrum density function for a melon by shock vibration had one sharp peak and its variation was ±1.1Hz, so the reappearance of spectra was very high. We need to find a suitable angle of the pendulum which had little effect on the power spectrum density function. A level or opposite side for the hitting point proved to be suitable for the detecting point.
2. There were differences in the frequency response function between equator and stem-calyx side exciting by random vibration, because each melon has a different structure, weight, size and so on. Averaging the spectrum made the uneven spectra smooth at only 32 times/15 seconds. The spectra had 3 to 5 peaks and the first one was the biggest and the variation of the first and second peak frequency was within an observational error, ±2.2Hz. As above, the reappearance was very high and the random vibration method proved to be more useful than the sweep vibration method.View full abstractDownload PDF (1004K) -
Actual Size ExperimentHideo OGAWA, Ichiei TSUGE, Yoshikazu SATO, Shinji HOSHIBA, Susumu YAMA ...1989 Volume 19 Issue 3 Pages 173-182
Published: March 20, 1989
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSExperiments on the yield strength of the pipe-houses were conducted. These houses are constructed using pipe framing, which is anchored to the ground by each pipe frame being pushed into the ground for 30 to 40cm. Twelve pipe-houses of actual size were evaluated. The pipe house were divided into eight types, depending upon the method of pipe connection at the ridge (joint type), the usage of braces and the span size. For comparison, a theoretical analysis was conducted with regard to four treatments to describe the structural behavior of the pipe portion that was buried in the ground.
Pipe-houses proved to be extremely tenacious. The yield strength of a swedge joint type is about 30% lower than that of an outer joint type because the ratio of the rise to the span is less (see Fig. 1 for joint description). The pipe house without braces has about a 20% lower yield strength than that with braces. The theoretical results assuming the pipe end is fixed under ground agreed most closely with observed experimental results. Using this assumption, when the angle of the pipe to the ground becomes close to 90°, or when the span siza on the ground becomes almost equal to that at the eave, the calculated displacements increased 25% to 60% at the ridge and 15% to 40% at the eaves.View full abstractDownload PDF (2164K) -
1989 Volume 19 Issue 3 Pages 201
Published: 1989
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSDownload PDF (98K)
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