using hot engine coolant to heat a vehicle), or a portion of heat that would otherwise be wasted can be reused in the same process if make-up heat is added to the system (as with heat recovery ventilation in a building).

Thermal energy storage, which includes technologies both for short- and long-term retention of heat or cold, can create or improve the utility of waste heat (or cold).  One example is waste heat from air conditioning machinery stored in a buffer tank to aid in night time heating. Another is seasonal thermal energy storage (STES) at a foundry in Sweden.  The heat is stored in the bedrock surrounding a cluster of heat exchanger equipped boreholes, and is used for space heating in an adjacent factory as needed,in June 2016.

Bedi joined Facebook at a time when the social networking giant was embroiled in a controversy around its Free Basic initiative, which offered free connectivity to select internet services in several parts of the country. Facebook was forced to drop the initiative after howls of protest.

image credit: engadget.com

Express Wi-Fi initiative project, was launched under directorship of Umang Bedi. Under this project, the company partners with telecom companies, internet service providers, and local entrepreneurs to help expand connectivity to under-served locations. There was also good increase in no. of subscribers’ base under his tenure.

Facebook had over 142 million Monthly Active Users as of March 2016, which jumped to 201 Monthly Active Users as of July, adding over 50 million users in just the first six months of