A way of expressing the first law of thermodynamics is that any change in the internal energy (âE) of a system is given by the sum of the heat (q) that flows across its boundaries and the work (w) done on the system by the surroundings:
Titles don't really mean much. Design Engineer or Associate Engineer mean something only in the confines of the company in which they are used. If you want a definition of different levels of engineers, use the definitions given by ASCE or one of the other professional societies.
This Letter-Appointment of Associate Director should be used to appoint anyone (usually an employee) who it is proposed will be an Associate Director. The office of Associate Director is often used by companies to give an incentive to key employees by recognising their importance within a company.