According to Aristotle, both tragedy and epic are forms of imitation. Tragedy imitates directly by means of mimesis and epic both directly and indirectly by means of mimesis and diegesis. While epic imitates solely by means of words, tragedy also imitates by means of spectacle. Both epic and tragedy portray people better or greater than the average spectator, unlike comedy which portrays people as worse than they actually are and uses humour to dissuade us from acting badly (Aristotle's lost treatise on comedy may be summarized in the Tractatus Coislinianus; see also Eco, The Name of the Rose for interesting view of Aristotle on comedy)
Due to practical constraints of production, tragedy ideally has a single unified action which is often restricted to a specific time and place. and a small n umber of characters, while epic has a broader scope of coverage.
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One of the saddest facts about World War I is that millions died needlessly because military and civilian leaders were slow to adapt their old-fashioned strategies and tactics to the new weapons of 1914. New technology made war more horrible and more complex than ever before. The United States and other countries felt the effects of the war for years afterwards.
The popular image of World War I is soldiers in muddy trenches and dugouts, living miserably until the next attack. This is basically correct. Technological developments in engineering, metallurgy, chemistry, and optics had produced weapons deadlier than anything known before. The power of defensive weapons made winning the war on the western front all but impossible for either side.
It was a treaty signed on december 29th 1835 in New Echota, Georgia by officials of the United States government and representatives of a minority Cherokee political faction, the Treaty party
The science of adjusting environments, tasks, or procedures to fit the individual is ERGONOMICS. In other words, it is also defined as the study of a worker's efficiency in a workplace and how this efficiency can be improved together with the well-being of the worker.