Tacoma Narrows Bridge (1940) Billah and Scanlan (1991) reported that in fact, many physics textbooks (for example Resnick et al. and Tipler et al.) wrongly explain that the cause of the failure of the Tacoma Narrows bridge was externally forced mechanical resonance. Resonance is the tendency of a system to oscillate at larger amplitudes at certain frequencies, known as the system's natural frequencies. At these frequencies, even relatively small periodic driving forces can produce large amplitude vibrations, because the system stores energy. For example, a child using a swing realizes that if the pushes are properly timed, the swing can move with a very
Metaphor therapy a psychological ground on which movement can occur, and this freedom of movement is the aim of therapy. By linking different things, metaphors aim at conceptual change through new insight, involving re-categorization of experience along new lines of meaning. Metaphorical interpretation of life, rather than analogical, combines the past with what is new. The transference relationship is thought of as an example of metaphor, a kind of symbolic translation of earlier strivings to present-day circumstances, as opposed to a re-enactment, which would lose the creative power of the metaphor and be merely analogic. The use of metaphor therapy in psychotherapeutic