Bronfenbrenner's final level is the macrosystem, which is the largest and most remote set of people and things to a child but which still has a great influence over the child.
Term EMF is acronym for Electro-Motive-Force , that is a Force that Moves Electric Charge. It is not implied by the name of that term whether the origin of the Force is elecrostatic, magnetic , thermoelectric , or electrochemical.
MDF (Medium Density Fibreboard). MDF is a type of hardboard which is made from wood fibres glued under heat and pressure. MDF has many qualities that make it an ideal alternative to plywood or chipboard. It is dense, flat, stiff, has no knots and is easily machined.ardboard is a compressed, composite board. Fibre residuals are saturated in a wet process and then compressed to a sheet. A fine fibre overlay is applied (normally to one side) to provide smooth face. Three basic types are available-standard, medium and oil-tempered.