President's Page: Objective — Perpetual Growth

Multi-society Presidents' page: The value of membership in your sub-specialty society.

Presidents, Vice Presidents, and Death: Closing the Constitution's Succession Gap

Underwriting the presidents.

The United States has had 43 presidents. We examined whether they survive significantly longer or shorter than their contemporaries. We found that survival was better for presidents elected in the 1789-1841 and 1933-2001 periods (SMRs of 0.7 and 0.6, respectively), but worse for those elected in 1845-1929 (SMR = 2.9). We also found increased mortality during the years lived in office (SMR = 1.4...

Presidents who value science.

www.sciencemag.org SCIENCE VOL 323 13 FEBRUARY 2009 843 COVER An image of Mare Moscoviense on the lunar farside, taken by the Terrain Camera aboard the SELENE (Kaguya) spacecraft on 17 January 2008. Crater frequency distributions derived from such images yield ages of about 2.5 billion years for several volcanic deposits in this mare, indicating that volcanism on the lunar farside lasted about ...

Investigating Objective Measures of Web Page Aesthetics and Usability

As part of the ongoing debate about the role of aesthetic design of interfaces, this paper presents an aesthetic evaluation tool which quantifies the layout characteristics of a web page according to fourteen different metrics. By using the rich medium of web pages as our input, we have significantly extended the prior work done in this area which has typically focussed on simple interfaces. We...