plato in theory of philosopher-king believes that all of the members of ideal city-state, whether ruler or citizens, will attain happiness if the philosopher is the ruler. but there are paradoxes in the theory and the bases of the happiness are unstable too. in other words, plato in his theory presents hierarchical dualities (intelligible/visible world, episteme/ doxa,true/ untrue or shadow, …)...

not a motion that does not speak and in an intelligible language without discipline, and a public language that everyone understands.

During push switch operation, tactile feedback is crucial in determining whether the operation will be successful. However, to enhance and ensure usability, actuation force should not increase. Herein, a method improve during by designing operating sound proposed. In first experiment, investigate acoustic characteristics of high sound, participants evaluated recorded commercial sounds through h...