Engineering in Time: The Systematics of Engineering History by A A Harms

By A A Harms

Creation to Engineering; historical past of Engineering; modern Context of Engineering

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Extra resources for Engineering in Time: The Systematics of Engineering History and Its Contemporary Context

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6 Chap02 25 Prehistory and Invention Stone tools of the Prehistoric era appear to have many independent inventors because similar tools have been found in various distant regions. There is also good reason to believe that — unlike present practice — Stone Age people made tools for personal use only as the need arose and these were subsequently discarded; hence the reason for many stone chipped tools found at habitation sites. With stones generally plentiful and their production simple, there was no need to be burdened by always carrying them around.

7 To Think About • Consider common devices such as bicycles, cars, household appliances, aircraft, etc. What events or developments have enhanced or could have frustrated their particular evolution? 3d) appears like a conventional input → output model applicable to many areas of engineering. Explain the reasons for this similarity emphasizing in particular the thoughts and actions of engineers. • Homogeneous progressions are generally describable using the calculus; in contrast, heterogeneous progressions are equally common but very difficult to describe analytically.

1 Time axis illustration of Prehistoric Engineering (∼106 BP → ∼104 BP). The several characterizations here introduced for this period of time in the Content Summary take on the form of a column vector; note, however, that the components are not independent. 8 To Think About • Some ancient artifacts survive with time better than others. Why is this and what are the important conditions and underlying physical processes? • Fire is a means of generating thermal energy. Why does this natural phenomena render some food edible and also destroy some bacteria?

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