The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level.
invented by IBM
The IBM Simon Personal Communicator (simply known as IBM Simon) is a handheld,…
invented by CERN
A touchscreen or touch screen is the assembly of both an input (‘touch…
invented by Douglas Engelbart
A computer mouse (plural mice, sometimes mouses)[nb 1] is a hand-held pointing…
invented by Frits Zernike
Phase-contrast microscopy (PCM) is an optical microscopy technique that…
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