Demolition by implosion: detonation of small quantities of strategically placed explosives can demolish an unwanted high-rise in a matter of seconds

Article Abstract:

Controlled Demolition Inc (CDI) has developed a technique for tearing down buildings through implosion, which involves the use of small amounts of dynamite applied to structural supports. When these supports give way, the structure implodes. CDI used the technique to demolish a Florida hotel.

Methods, Usage, Services, Explosives, Wrecking, Demolition, Controlled Demolition Inc.

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Does class size matter?

Article Abstract:

Issues concerning the role of the class size in increasing the effectiveness of teaching and learning are discussed. Particular attention is given to experimental projects conducted in the United States reflecting the benefits of smaller classes.

Standards, Influence, Learning, Class size

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Bent light: gravitational distortions illuminate dark matter

Article Abstract:

Dark matter cannot be viewed directly, but its properties can be observed when it distorts the view of luminous matter. Dark matter is believed to comprise as much as 99% of the universe's mass.

Observations, Dark matter (Astronomy)

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