Naming difficulties may be rank ordered along a continuum. Items are rank ordered in terms of their ability to be named, which is correlated with their frequency. This type of picture-naming test is also useful in the examination of children with learning disabilities and the evaluation of brain-injured adults.
The Jarvik-7 heart was developed by American scientist Robert Jarvik and his mentor, Willem Kolff. In 1982, Seattle dentist Dr. Barney Clark was the first person implanted with the Jarvik-7, the first artificial heart intended to last a lifetime.
Alfred Nobel, in full Alfred Bernhard Nobel (born October 21, 1833, Stockholm, Swedenâdied December 10, 1896, San Remo, Italy), Swedish chemist, engineer, and industrialist, who invented dynamite and other, more powerful explosives and who also founded the Nobel Prizes.