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Articles by S. Rafiee
Total Records ( 3 ) for S. Rafiee
  H.S. Hassani , A. Jafari , S. Rafiee , S.S. Mohtasebi and A.M. Setayesh
  The JD 955 combine harvester manufactured by ICM. Company has two hydraulic circuits which are the principal circuit (dividing valve circuit) and the steering circuit. Therefore, investigation and inspection of defects of the hydraulic system used in combine, considering its functions in the machine is so significant. In this article the problems of the hydraulic system throughout JD 955 combine harvester and the way services are given for disappearing the problems, have been investigated. For this purpose some 90 combines were selected which had been supplied to the customers over the last one or two years. The 140 defects detected from their hydraulic circuits were analyzed then services supplied to the selected combines and actually after sales services were researched within some categories. Results showed that the hydraulic pump had the most problems and was spent the most expense. In addition, throughout the after sales service categories only charges of the defects had significant difference with each other. Finally some policies suggested in order to decrease and eliminate the defects.
  K. Kheiralipour , A. Tabatabaeefar , H. Mobli , S. S. Mohtasebi , S. Rafiee , A. Rajabipour and A. Jafari
  In this study, two theories for terminal velocity of fruits were proved by authors as KHAT1 and KHAT2 theories. Terminal velocity of Redspar apples was experimentally measured using water column and video camera. Some apple characteristics that affect on terminal velocity of apple based on proved theories were determined using standard methods. There is found that the most effective characteristics on apple terminal velocity were density and volume. The best equation for terminal velocity of Redspar apples was found with R2 = 0.69.
  K. Kheiralipour , A. Tabatabaeefar , H. Mobli , S. Rafiee , A. Sahraroo Sahraroo , A. Rajabipour and A. Jafari
  Several physical properties as physical characteristics, mechanical, hydrodynamic and nutritional properties of two apple varieties (Redspar and Delbarstival), were determined and compared using Duncan`s multiple ranges test. Physical characteristics such as: average fruit length, width, thickness, the geometric, arithmetic and equivalent mean diameter, projected area, surface area, sphericity index, aspect ratio, fruit mass, volume, true density and moisture content, were determined for both varieties. The coefficient of static friction on plastic, plywood and galvanized iron, flesh firmness, failure stress, modulus of elasticity were found. The terminal velocity, coming up time, bouncy and drag forces, as hydrodynamic properties and total dry matter, total soluble solid, pH and titratable acidity, as nutritional properties, were determined. It was concluded that most of properties of two apple varieties was statistically different at the one percent probability level.
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