Criminals, terrorists and military have been using  tunnels since long time to evade detection as surface based detection methods are ineffective underground .   Indian Border Security Force (BSF) troopers in Nov 2020 discovered an underground tunnel on the international border at Regal area in J&K`s Samba district, officials said. As …

Renewable energy is at the centre of the transition to a less carbon-intensive and more sustainable energy system. Renewables have grown rapidly in recent years, accompanied by sharp cost reductions for solar photovoltaics and wind power in particular. The future development of wind power presents a significant opportunity in terms …

Fiber optical circulators are used to separate optical signals that travel in opposite directions in an optic fiber in order to complete bidirectional transmission. Optical circulators are also known as non-reciprocal optics, which means when the light travels in the opposite direction, changes in the light properties are not reversed. …