Author: lightyourbrain

Microsoft Excel learning is perceived as more attractive from time to time and it is probably the most widely software‐learning topic written into books, websites, courses, tutorial videos, groups, etc.

Air conditioning (of which refrigeration is an inseparable part) has its origins in the fundamental work on thermodynamics which was done by Boyle, Carnot, and others in the seventeenth and eighteenth centuries, but air conditioning as science applied to practical engineering owes much to the ideas and work of Carrier, in the United States of America, at the beginning of this century.

A new discipline is said to attain maturity when the subject matter takes the shape of a textbook. Several textbooks later, the discipline tends to acquire a firm place in the curriculum for teaching and learning.