In this study, dichlorodifluoromethane (R12) gas and mixtures with nitrogen (N 2) and air at different pressures and mixing ratios have been investigated and showed good alternative to SF 6 gas in terms of high-voltage application. Mixed gases contain R12 gas, they offer good dielectric properties and possibility to be used in low-temperature environment. Synergistic effects and self-recoverability test have been performed. Dielectric strength under quasi-uniform field showed in the order of SF 6 > R12 > N 2 > air in alternating current (AC), direct current (DC) and impulse was examined. Mixture R12/N 2 (80/20%) could reach over 0.90-0.95 times to that of SF 6 gas at 50 lb/in 2 at AC and R12/air (70/30%) gives 0.80-0.90 to SF 6 gas. R12 gas presents brilliant self-recoverability. The optimal ratio to switch SF 6 gas is R12/N 2 (80/20%) and R12/air (70/30%) is based on the authors' experimental condition and setup.
The agricultural sector worldwide is facing many issues relating to crop productivity due to the lack of communication between extension workers and farmers. To reduce this gap, information technology like mobile phones are one of the essential communication devices in numerous fields as well as agriculture. This review aims to analyze mobile phone usage in agricultural modernization and rural development. The advancement of the agricultural sector in rural areas is essential for reducing poverty among growers. As we all know, agricultural activities provide employment opportunities and generate income in rural areas. Poverty can be decreased by advancement in the agriculture sector for better production. Agriculture production, socioeconomic conditions, and food security can be improved by increasing the usage of mobile phones for easy and accurate agricultural knowledge sharing to the farming community.
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