Vibration Effects on the Performance of a Single-Shank Subsoiler

Rosana G. Moreira, Editor-in-Chief; Texas A&M UniversityThis is a paper from International Commission of Agricultural Engineering (CIGR, Commission Internationale du Genie Rural) E-Journal Volume 9 (2007): Vibration Effects on the Performance of a Single-Shank Subsoiler. Manuscript PM 07 018. Vol. IX. September, 2007

Automatic non-destructive quality inspection system for oil palm fruits

In this research a non-destructive, rapid and cost effective examination machine for the estimation of the ripeness fraction, oil content and free fatty acid level in oil palm fresh fruits bunch was developed. The automatic machine-vision based in- spection system provided consistency, rapid estimation and accep- table accuracy results in non-dest ructive manner. Fresh fruits bunch samples from Tenera cultivar (7 to 20 years trees) were taken from Cimulang plantation, Bogor, Indonesia. Two statistical analysis methods were used: a forward stepwise multiple linear regression analysis and a multilayer-perceptron artificial neural network analysis. The best prediction of ripeness and oil content models were obtained using the latter method, while the best free fatty acid prediction model was developed by the first method. The models were then employed in the machine-vision inspection systems of the machine. The system best prediction accuracy of ripeness, oil content and free fatty acid models was 93.5, 96.41, and 89.32%, with standard error of prediction being 0.065, 0.044 and 0.068, respectively. The system was tested through a series of field tests, and successfully examined more than 12 t of fruits bunch per hour, without causing damage

Automatic Non-destructive Quality Inspection System for Oil Palm Fruits

In this research a non-destructive, rapid and cost effective examination machine for the estimation of the ripeness fraction, oil content and free fatty acid level in oil palm fresh fruits bunch was developed. The automatic machine-vision based in- spection system provided consistency, rapid estimation and accep- table accuracy results in non-dest ructive manner. Fresh fruits bunch samples from Tenera cultivar (7 to 20 years trees) were taken from Cimulang plantation, Bogor, Indonesia. Two statistical analysis methods were used: a forward stepwise multiple linear regression analysis and a multilayer-perceptron artificial neural network analysis. The best prediction of ripeness and oil content models were obtained using the latter method, while the best free fatty acid prediction model was developed by the first method. The models were then employed in the machine-vision inspection systems of the machine. The system best prediction accuracy of ripeness, oil content and free fatty acid models was 93.5, 96.41, and 89.32%, with standard error of prediction being 0.065, 0.044 and 0.068, respectively. The system was tested through a series of field tests, and successfully examined more than 12 t of fruits bunch per hour, without causing damage

Hlađenje objekata zaštićenog prostora u vlažnim tropskim uslovima - problemi i rešenja

The development of a greenhouse suitable for protected cultivation in the humid tropics is still far from being realized. Reducing the heat load without increasing humidity inside the greenhouse, pest exclusion without heavy reliance on chemicals and monitoring plant response to changes in the microenvironment are the main challenges. As such the development of a strategy that allows for rational use of resources for high quality plant production while ensuring maximum protection and sustainability of the environment is still being sought. The progress made in developing an adapted greenhouse that encourages biological pest control and simultaneously offers an optimum microclimate is discussed in the concept of integrated plant production in the humid tropics.Konačno rešenje objekta zaštićenog prostora pogodnog za gajenje useva u vlažnim tropskim uslovima, još uvak nije nađeno. Glavni problemi su kako sniziti temperaturu u objektima a pritom ne povećati relativnu vlažnost vazduha i kako eliminisati insekte bez povećane upotrebe hemijskih zaštitnih sredstava. U svetu se sve češće predlažu nove strategije održive poljoprivrede čijom bi se primenom smanjila upotreba hemijskih zaštitnih sredstava i tako dikerktno uticalo na ekološki opravdaniju poljoprivrednu proizvodnju ne umanjujući time kvalitet na ovaj način dobijenih poljoprivrednih proizvoda. U radu se analizira mogućnost razvoja tehnološko-tehničkog sistema objekta zaštićenog prostora u kome bi bila moguća biološka kontrola insekata uz održanje optimalnih mikroklimatskih uslova