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Volume 45 (2014)
- Issue 4 Pages 148-
- Issue 3 Pages 99-
- Issue 2 Pages 43-
- Issue 1 Pages 1-
Volume 45, Issue 1
Vol. 45, No. 1 (Ser. No. 140)
Displaying 1-3 of 3 articles from this issue
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Takuji KAWAGISHI, Natsuki MATSUNASHI, Koichi MIZUTANI, Naoto WAKATSUKI2014 Volume 45 Issue 1 Pages 1-7
Published: 2014
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSIt is important to prevent infectious disease expansion in swine by detecting respiratory tract infections in early stage. Counting sneezing and cough is conventionally used to detect the disease. In this paper, we propose the automatic monitoring system of swine sneezing and cough using a microphone-array, which achieves an automated recognition and localization procedure for swine in weaning period cough and sneezing sounds. To realize this system, it must be achieved that a swine cough and sneezing sound are detected successfully in spite of many noises in swine house. The noises cause detection errors in the system. A technique using a high-pass filter has been found effective to detect the sneezing that includes frequency component of over 30 kHz frequency components than noises. Another technique using a band-pass filter has been found effective to detect the cough that includes frequency component in the range of 10 – 20 (kHz). These detection techniques and a localization technique based on the time difference of arrival are evaluated in experiment. The obtained results suggest that the proposed technique worked with sufficient accuracy. The correct discrimination rate for sneezing was 99.9 % and correct location estimation rate for detected sneezing was 85.7 %. The correct discrimination rate of cough was 99.6 % and correct location estimation rate for detected cough was 75.0 %. These accuracies were enough to achieve automated recognition and localization procedure for swine cough and sneezing sounds.View full abstractDownload PDF (1631K) -
Yoshimichi YAMASHITA, Motoo FUKUHARA, Koichiro IWATA, Tatsuo SATO, Haj ...2014 Volume 45 Issue 1 Pages 8-13
Published: 2014
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSWe devised method for applying liquid compost and water to plants by using commercially available drip device fertigation. Generally, there are many insoluble contents in livestock manure. These particle size is so big that the existence of insoluble contents makes the application difficult by using drip device. In our system, after solid-liquid separation by Screw Press, the liquid was aerated and purified. On the other hand, the insoluble contents was mechanically separated to the solid. Therefore, the solid component of the liquid was broken up by biodegradation well. These made it possible that drip holes of irrigation tube didn’t stack. As a result, applying this liquid fertilizer to cucumber in greenhouse by using drip device, no stacking problems happened and cultivation of cucumber went well.View full abstractDownload PDF (995K) -
-1500 h Endurance Test of a Diesel Generator-Genta KANAI, Yukinori SHIBUYA, Hisashi KOWATA2014 Volume 45 Issue 1 Pages 14-24
Published: 2014
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSWe examined the use of rapeseed oil as diesel fuel to assess the rapidly increasing use of larger rapeseed crops and widening cultivated areas in Japan. A diesel generator was modified for this study using a commercial conversion kit. Then the generator was run for 1 250 h using straight rapeseed oil and 250 h with kerosene for comparison. Quality analysis of the engine oil showed no severe damage to the engine and no severe accident during the test run. The engine stopped several times, apparently because of plugging of the fuel filter as a result of insufficient maintenance. Homemade rapeseed oil can be contaminated, rather more than kerosene, with dust or moisture. Therefore, filter maintenance plays a more important role for an engine fuelled by rapeseed oil than that fuelled by kerosene. For practical use of a generator supplied with rapeseed oil, a backup system and a technician should be prepared for an unexpected engine stoppage. The diesel generator was found to consume more rapeseed oil hourly than kerosene by 6–13 % for a constant load and by 8 % for an alternating load, probably because kerosene has more calories than rapeseed oil. Engine oil analysis revealed that less soot was produced by the supplied rapeseed oil than by kerosene. The duration of 1 250 h for a generator is almost equal to 7 years of operation, which is the useful lifetime for agricultural equipment based on depreciation (Japanese Ministry of Finance) of this power source, which can be used for grain-drying to oil-cleaning processes for 2 ha rapeseed cultivation.View full abstractDownload PDF (935K)
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