Solar energy is a clean renewable energy and it is available around 89,000 TW on the earth surface. To get maximum power from a solar PV system with minimum power transfer loss is one of the main design objectives of an energy transferring network. Power electronic devices perform a very important character for an efficient PV power tracking system control and either incorporates to transfer the generated power to the ac/dc grid or battery storage system. In this case the duty of the power electronics devices used in PV system is to track maximum power point under different operating conditions of environment, so that power tracking efficiency of solar PV system can be improved. This paper encapsulates based the on performance comparisions on the behavior of MPP under uniform and nonuniform operating conditions and selects the optimum duty cycle for industrially accepted MPPT techniques with their algorithm.

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The 2020 COVID-19 pandemic introduced significant information challenges for older adults worldwide. Given the widespread disparities in information infrastructure and access between developing and developed countries, the challenges presented during this period may be even more grave in the developing world. This interview study examines how older adults (age 65+) in two countries—the USA and India—experienced information needs, sources, and barriers. The results indicate distinct experiences among the two populations, with individuals in the USA expressing more diverse needs, while Indian respondents focused on the impact of COVID-19. The American respondents also indicated much greater use of Internet resources compared to the Indian respondents, who used television and print resources more frequently. Far more Indian respondents reported significant challenges finding information to satisfy their information needs. The findings of this study have important ramifications for the design of intervention, education, and support for the information-related needs of older adults worldwide.

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