Volume 21, Issue 7 (Supplementury Issue 2019)
Abstract
Agricultural ethics has been widely discussed in recent decades. However, in spite of numerous studies there is no consensus on this issue, especially in developing countries. Accordingly, this study was conducted with the aim of the examining farmers’ view on agricultural ethics in Sonqur County, Kermanshah province, Iran. This study used a hybrid model to define the concept of agricultural ethics through three phases. For the theoretical phase, the attributes of agricultural ethics were identified through review of the literature (until 2017). Also, in-depth interviews with 32 participants were conducted for the fieldwork to develop attributes from the data and to verify those identified from the literature review. In the third phase, attributes and final analysis of agricultural ethics were extracted from the first and second phases. Based on the integration of the literature and the results from the interviews, agricultural ethics was described as follows: a complex subject involving farm structure, food security, food safety, global trade, agricultural biotechnology, trust in science, research ethics, environmental impacts, animal ethics, and rights. The scope of agricultural ethics ranges from macro issues at national and global levels to human ecology (human relationship with the environment) of a farmer, suggesting that it has a systemic thinking that is necessary to achieve sustainability.
Mohammad Baraheni , Rasoul Khoshdoni Farahani , Ali Malekhoseini ,
Volume 23, Issue 10 (October 2023)
Abstract
Composites reinforced with carbon fibers have various applications in different industries, due to their physical and mechanical properties. In this regard, multi-walled carbon nanotubes are used to strengthen the epoxy resin base, which is one of the emerging and important materials. Since machining is required to repair reinforced composite parts, in this research, the damages caused during the process should also be investigated and solutions should be provided. In this study, the delamination damage in the machining of composite parts of epoxy reinforced with carbon fibers and multi-walled carbon nanotubes has been discussed. In this regard, experiments have been conducted with a carbide end-mill at different cutting speeds and feed speeds. Then the delaminations created in these tests are studied. In the analysis of the results, by increasing the rotational speed from 500 to 2500, the amount of delamination increased by 25% and the force decreased by 87%. Also, solutions that include reducing the feed speed will have a significant effect on improving the final quality of the machined part.