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Showing 3 results for Bazrafkan
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
The effectiveness and return on investment (ROI) of agricultural training programs have always been among the most significant challenges for experts and managers in agricultural extension and development. Based on this, the main objective of the present study was to evaluate the effectiveness of beekeeping training courses using the ROI technique. This study is an applied and quasi-experimental research conducted by collecting data in two phases (before and after the training course). The data collection tool was a semi-structured, researcher-made questionnaire. Additionally, the ROI calculation was carried out through a nine-step process, enabling the assessment of ROI for both participants of the beekeeping training courses and the Agricultural Research, Education, and Extension Organization. In this process, along with tangible and/or monetary effects, intangible and non-monetary impacts were also quantified. The findings of this study indicated that, on average, beekeeping training courses had a 1302% return on investment for participants. Furthermore, these courses yielded an average ROI of 770% for the Agricultural Research, Education, and Extension Organization. The results provide strong evidence supporting the enhancement and expansion of beekeeping training courses and similar programs conducted by the organization. Moreover, this study and its findings serve as a starting point for further research on evaluating the impacts of agricultural training programs, ultimately supporting decision-making and investment development in training farmers and agricultural beneficiaries.
Volume 7, Issue 3 (10-2016)
Abstract
Volume 20, Issue 1 (January 2020)
Abstract
In this research, the deformation of a non-Newtonian leaky-dielectric droplet suspended in another non-Newtonian fluid under a uniform electric field is simulated. The aim of this research is the studying the effect of the electric field on the hydrodynamic of non-Newtonian droplets and also the comparison between the behavior of Newtonian and non-Newtonian droplets in the presence of an electric field. The power law model is used to describe non-Newtonian fluid behavior. The level set method is employed to determine the location of the interface. Also, the ghost fluid method is used to apply discontinuities at the interface. By applying an electric field, a non-Newtonian droplet deforms similarly to a Newtonian one. This deformation may occur either in the direction of the electric field or perpendicular to it. By increasing the electric Capillary number (ratio of electric force to surface tension force) the deformation of the non-Newtonian droplet with different power law constants increases. In this research, the behavior of different non-Newtonian droplets with different power constants was compared and it was observed that by an increase in the power law constant the drop deformation increases. According to the results, the deformation of a shear-thinning droplet under an electric field is less than the deformation of a Newtonian droplet and the deformation of a Newtonian droplet is less than the deformation of a shear thickening droplet.