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An effective TBC needs to meet certain requirements to perform well in aggressive thermo-mechanical environments. [2] To deal with thermal expansion stresses during heating and cooling, adequate porosity is needed, as well as appropriate matching of thermal expansion coefficients with the metal surface that the TBC is coating.
The phrase Fourth Industrial Revolution was first introduced by a team of scientists developing a high-tech strategy for the German government. [13] Klaus Schwab, executive chairman of the World Economic Forum (WEF), introduced the phrase to a wider audience in a 2015 article published by Foreign Affairs. [14] "
The Mycobacterium tuberculosis complex (MTC or MTBC) is a genetically related group of Mycobacterium species that can cause tuberculosis in humans or other animals.. It includes:
In 2008, evidence for tuberculosis infection was discovered in human remains from the Neolithic era dating from 9,000 years ago, in Atlit Yam, a settlement in the eastern Mediterranean. [7] This finding was confirmed by morphological and molecular methods; to date it is the oldest evidence of tuberculosis infection in humans.