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This work describes a mathematical model for determining the power demand for a vertical shaft mowing machine, particularly taking into account the influence of speed on cutting power, which is different from that of other models of mowers. The influence of the apparatus' rotation and translation speeds was simulated in determining power demand. Th...
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Three agricultural implements (soil preparation machine, disk harrow and circular self-cleaning harrow) were used in four repetitions. The surface area of the field was 19530 m 2 and it was divided into twelve plots of 1627,5 m 2 each. The test was aimed at proving that time and fuel and, consequently, money can be saved, if new agricultural machin...
Citations
Surface treatment of polydimethylsiloxane (PDMS) with a rotative nozzle atmospheric pressure plasma jet (APPJ) was reported. Operating conditions were optimized by statistical design of experiments, using water contact angle and XPS as response variables; OES (optical emission spectroscopy) was used for plasma diagnosis. The nozzle-PDMS distance and the torch speed were the most influencing parameters and were optimum at 6.6 mm and 10.3 m s-1, respectively. The extent of hydrophobic recovery of treated PDMS, investigated by water contact angle measurements, was less than what reported in the literature for this amorphous polymer. However, the APPJ treatment proposed in this paper is meant to be inserted in line for a homogeneous surface treatment of PDMS for enhanced adhesion improvement to coatings or adhesives. Nozzle-sample distance and torch speed are revealed as the most influencing factors of atmospheric pressure plasma jet (APPJ) for surface treatment and hydrophilicity enhancement of polydimethylsiloxane (PDMS). Degree of surface modification is correlated with homogeneity of APPJ treatment, plasma composition and temperature, and treatment conditions are optimized through maximizing oxygen content of plasma-treated surface.
