According to the statistics by the World Bank, the population aged 65 and above as a share of the total population around the globe touched 9.318% in the year 2020, up from 6.874% in the year 2000. Moreover, according to the statistical report titled “World Population Ageing 2019” published by …

The transmission loss of the light passing through the optical fiber is a very small value of less than 0.2 dB per km with a light wavelength in the 1,550 nm band. Therefore clearest optical fibers can transmit signals more than 100 kilometers without amplification-much farther than copper wires. When …

World economic growth will lead to strong energy demands and consumption.  U.S. Energy Information Administration’s latest International Energy Outlook 2017 (IEO2017) projects that world energy consumption will grow by 28% between 2015 and 2040. Most of this growth is expected to come from countries that are not in the Organization …