By mass–energy equivalence, the gravitational field has a relativistic mass density proportional to its energy density. I seek better understand this of by asking whether it plays three traditional roles mass: role in conservation mass, inertial role, and as source for gravitation. The difficult case general relativity is compared more straightforward cases Newtonian gravity electromagnetism wa...

In this paper, we study a flow shop batch processing machines scheduling problem. The fuzzy due dates are considered to make the problem more close to the reality. The objective function is taken as the weighted sum of fuzzy earliness and fuzzy tardiness. In order to tackle the given problem, we propose a hybrid electromagnetism-like (EM) algorithm, in which the EM is hybridized with a diversif...