70 Years Ferrocene!

The Haber-Weiss cycle--70 years later.

The chain reactions HO* + H2O2 --> H2O + O2*- + H+ and O2*- + H+ + H2O2 --> O2 + HO* + H2O, commonly known as the Haber-Weiss cycle, were first mentioned by Haber and Willstätter in 1931. George showed in 1947 that the second reaction is insignificant in comparison to the fast dismutation of superoxide, and this finding appears to have been accepted by Weiss in 1949. In 1970, the Haber-Weiss re...

Florigen coming of age after 70 years.

After Seventeen Years and 70 Issues

SUMMER 2016 3 In 1998, AAAI Publications committee chair Ken Ford invited me to become the Editor-in-Chief of AI Magazine. After two issues as Editor Elect, I became Editor-in-Chief in spring 1999. Now, 70 issues and 17 years later, I am still deeply grateful for the opportunity to contribute to AAAI and to the AI community through the editorship. It has been a privilege to guide the magazine’s...

General Aviation Pilots Over 70 Years Old.

BACKGROUND Currently it is not unusual for general aviation pilots in the United States to continue to fly beyond the age of 70, even into their 80s and 90s. Pilots have regular examinations according to protocols which do not specify special or additional requirements for pilots over 70 yr of age. Additionally, the third class medical reforms passed by the U.S. Senate on 15 July 2016 could pot...

Ring Rotation in Ferrocene and Ferrocene-containing Polymers

Ferrocene is an organometallic molecular sandwich complex with an iron atom coordinated between two cyclopentadienyl rings. The reorientation of these rings in a process of rotational jump diffusion between multiple equilibrium sites on a circle is investigated using quasielastic neutron time of flight and backscattering spectroscopy experiments. Existing results on the ring rotation in bulk, c...