Alex D. Krieger 1911-1991

Demographic decomposition of the marriage market in England and Wales 1911-1991.

A method for decomposing partner availability into its demographic components (preferences, previous birth trends, migration and mortality, and structure by marital status) is presented and applied to marriage market estimates for selected census years 1911-91 in England and Wales. Preferences are a key component at the youngest ages. The role of other factors varies by age and time period. Con...

Alex Kacelnik

Alejandro (Alex) Kacelnik grew up in Buenos Aires, where he studied Zoology and made his early research steps in comparative neurophysiology of amphibians, lizards and rats. In 1974 he took a British Council Scholarship in Oxford, where he completed a doctorate on decisionmaking in birds, a subject to which he has remained close ever since. He spent postdoctoral spells in Groningen, Oxford and ...

Maclyn McCarty (1911–2005)

The editorial board lost a real soul mate when Maclyn McCarty passed away on January 2nd at age 93. While attending the theater with friends, one of the many activities that he enjoyed, he collapsed. “Dr. Mac” was revered worldwide for his remarkable experiments that led to the identification of DNA as the genetic material. This totally unanticipated discovery, and the revolutionary 1944 paper ...

Simon Flexner, 1911

Chaos in Accelerators Alex

Chaos is a general phenomenon in nonlinear dynamical systems. Accelerators { storage rings in particular { in which particles are stored for 10 revolutions constitute a particularly intricate nonlinear dynamical system. (In comparison, the earth has revolved around the sun for only 10 turns.) Storage rings therefore provide an ideal testing ground for chaos physics. In fact, it is the chaos phe...