When an external hard-wired HOA switch is used to provide override control of a system element, indication of the. override action in the primary control system is frequently necessary to alert operators and to facilitate back-up. control strategies of dependent equipment.
Metaphors Shape Our Understanding of Reality. Metaphors and analogies are used constantly to help us make sense of the world we live in. In fact, they shape our understanding of the world and subsequently our mental model of reality. Moreover, they assist us with making more effective decisions and choices about the events and circumstances of our lives.
What is the purpose of a book? This is a complex question, for books have no purpose that is analogous to that of a plow or a needle. Books do many things, and also nothing at all in a practical sense-except perhaps to weight down papers and keep them from flying away.Books may serve one purpose for the writer and another for the reader-or rather one purpose for the writer and another purpose for each of the different readers who come to the text.his is not to say that the book is entirely unsuccessful: Some elements of it do work well, including the fact that this story is told in some measure as an epic story, a form of storytelling that is probably as old as humanity itself and that crosses cultural as well as historical bou...